Bacteria lack a membrane-enclosed nucleus, in contrast to eukaryotic (true) cells. A area of the cell known as the nucleoid is where the chromosome, a single continuous strand of DNA, is localized but not confined.
The presence of peptidoglycan, which is situated directly outside of the cell membrane, distinguishes the bacterial cell wall from that of all other organisms. An equal number of N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM) residues alternate in the polysaccharide backbone that makes up peptididoglycan.
Many eukaryotic cell structures are absent from bacteria. They lack a nucleus, for instance. They also lack organelles that are attached to membranes, such chloroplasts and mitochondria. Bacterial cells have DNA that is distinct from eukaryotic cells.
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Correct Question:
What type of structures would be found in a bacterium, but not in a human cell?
Mendel hypothesized that reproductive cells have only one factor for each inherited trait. this hypothesis is supported by which observation?
Mendel hypothesized that reproductive cells have only one factor for each inherited trait. This hypothesis is supported by haploid cells produced by meiosis.
Meiosis is a type of cell division in sexually reproducing organisms which reduces the number of chromosomes in gametes. In the human body the somatic cells which are present are generally diploid, that contain two sets of chromosomes (one from each parent). To maintain this constancy the egg and sperm unites during fertilization. So they must be haploid, with a single set of chromosomes. During the process of meiosis each diploid cell undergoes two stages of division to yield four haploid daughter cells which is known as the gametes. The purpose of meiosis is to produce gametes, or sex cells and to maintain the constancy of the chromosome. During meiosis, four daughter cells are produced, each of which are haploid that contains half as many chromosomes as the parent.
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what type of molecule is an enzyme?
Enzymes are protein molecules.Enzymes are proteins that act upon substrate molecules and decrease the activation energy necessary for a chemical reaction to occur by stabilizing the transition state.
The enzyme is made up of amino acids joined by peptide bonds. Enzymes are nothing but protein molecules made up of a long chain of amino acids. These long chains of amino acids are folded into a unique shape which helps enzymes to do their functions. Enzymes are biological molecules that speed up the process of any reaction virtually that takes place within the cells. Enzymes are mainly globular proteins. These are protein molecules where the tertiary structure has given the molecule a generally rounded, ball shape (although perhaps a very squashed ball in some cases). The other type of proteins (fibrous proteins) have long thin structures and are found in tissues like muscle and hair.
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which secondary metaphor has similarities with being a ‘liquid?’ mcom 2350
One secondary metaphor that has similarities with being a 'liquid' is the idea of being "fluid." When we describe something as "fluid," we are suggesting that it is flexible, adaptable, and able to move and change easily, much like a liquid.
For example, we might describe someone's communication style as "fluid" if they are able to adapt to different situations and communicate effectively with a variety of people. We might also describe a project plan as "fluid" if it is able to change and adapt as new information or challenges arise.
In both cases, the metaphor of being "fluid" suggests that the thing in question is able to move and adapt easily, just as a liquid can flow and take on different shapes.
Another secondary metaphor that is similar to being a "liquid" is the idea of being "flowing." When we describe a person or situation as "flowing," we mean that they are moving forward with a sense of momentum and ease, just as a liquid moves easily from one place to another. Being "flowing" can suggest a sense of energy, purpose, and direction, and can be used to describe people who are achieving their goals or situations that are progressing smoothly.
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proteins that function in the mitochondria are made by
Nuclear genes encode approximately 99% of mitochondrial proteins, including prokaryotic genes that were transferred to the nucleus as well as genes coding for novel mitochondrial proteins created by eukaryotic cells.
The overwhelming majority of mitochondrial proteins are now produced in the cytoplasm and imported into the organelle by a complex network of protein translocases. The mitochondrial rRNAs are encoded by mt DNA, whereas the nuclear genome encodes ribosomal proteins, which are made on cytoplasmic ribosomes and then imported into the mitochondria.
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Please help me fast ………
Answer: B
Explanation:
the most likely source of the taq polymerase used in pcr is a bacterium that lives in
A bacterium that resides in hot vents is the most likely source of the Taq polymerase used in PCR.
PCR means a vicious polymerase circle. It's a test to discover hereditary material from a particular animal to a degree a bug. The test detects the appearance of a virus if you have the bug event of the test. The test manages further discover fragments of the bacterium even afterward you are not any more polluted.
Taq polymerase is a thermostable DNA polymerase I chose later the thermophilic eubacterial germ Thermus aquaticus, from what or which place it was initially unique by Chien and others? in 1976. Its name is often shortened to Taq or Taq pol.
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The complete question is:
The most likely source of the Taq polymerase used in PCR is a bacterium that lives in ______. (Module 4c)
Which of the following events would best be described as a case of sympatric speciation?
a. An individual plant undergoes meiotic failure, producing diploid pollen and ovules; these self-fertilize, germinate, and grow into several fully fertile tetraploid plants.
b. A population of lizards is subdivided by a natural barrier and subsequently diverges to form two species that cannot interbreed.
c. A new, isolated population of fruit flies is founded by a small group of colonists, who then diverge from the ancestral source population.
d. Speciation cannot take place in sympatry, only in allopatry, where geography poses a barrier to gene flow.
Option A: An individual plant undergoes meiotic failure, producing diploid pollen and ovules; these self-fertilize, germinate, and grow into several fully fertile tetraploid plants, is best described as a case of sympatric speciation.
The most frequent way for this speciation occurrence to happen is by polyploidy, in which a child or group of children will be born with twice as many chromosomes as is typical. These offspring may have four copies of each chromosome (polyploidy), whereas a typical person has two copies of each chromosome (tetraploidy). Reproductive isolation results from a tetraploid's inability to mate with a diploid.
Sympatric speciation is a type of speciation that takes place when two populations of the same species coexist in the same geographical area but develop in distinct ways to the point where they can no longer interbreed and are thus classified as separate species.
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the liquid inside the stomach is said to be acidic. what does that mean? select all that apply
The liquid inside the stomach is said to be acidic it means that the pH of liquid inside the stomach is below 7 and many other things like
The liquid has a pH that is lower than 7 on the pH scale.
The stomach secretes hydrochloric acid (HCl) to aid in food digestion and eliminate dangerous microorganisms.
The stomach's acidity aids in the activation of digestive enzymes and facilitates the absorption of some nutrients.
Sometimes the stomach's acidity can result in discomfort or irritability, such as heartburn or indigestion.
In conclusion, the term "acidic" refers to the stomach's liquid contents having a pH below 7 and the stomach's production of hydrochloric acid, which aids in digestion.
Gastric juice is the liquid inside your stomach. It is a complex mixture of several chemicals, not just acid and enzymes. Examine the molecules, the cells that produce them, and the functions of the various components like Water , Mucous ,Hydrochloric Acid, Pepsinogen Hormones and Electrolytes, Gastric Lipase, Intrinsic Factor, and Amylase.
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erwin chargaff determined that the number of _____ like guanine and adenine always equal the number of ____ like cytosine and thymine. purines pyrimidines.
Erwin Char-gaff determined that the number of purines, like guanine and adenine, always equal the number of pyrimidines, like cytosine and thymine, in DNA. This is known as Char-gaff's rule,
What is Char-gaff's rule?Char-gaff's rule is a fundamental principle of DNA base pairing that states that in a DNA molecule, the amount of guanine (G) is equal to the amount of cytosine (C), and the amount of adenine (A) is equal to the amount of thymine (T). Specifically, Char-gaff found that the base composition of DNA varies between species, but within a given species, the percentage of A always equals the percentage of T, and the percentage of G always equals the percentage of C.
Char-gaff's rule is important because it provided crucial information for the development of the double helix model of DNA proposed by James Watson and Francis Crick. It helped explain how DNA molecules are able to maintain their structure and replicate accurately during cell division. The rule suggests that the complementary base pairing of A-T and G-C is the key to the stability of the DNA double helix, as A can only form hydrogen bonds with T, and G can only form hydrogen bonds with C. Therefore, the amount of A must equal the amount of T, and the amount of G must equal the amount of C, for the two strands of the DNA molecule to come together and form a stable helix.
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Which of the following organelle is found in only plant cells?
Cell Membrane
Vacoule
Nucleus
Cell wall
Answer:
Chloroplasts
Explanation:
Chloroplasts are the food producers of the cell. The organelles are only found in plant cells and some protists such as algae. Animal cells do not have chloroplasts. Chloroplasts work to convert light energy of the Sun into sugars that can be used by cells.
What are the bonds in a glucose molecule?
The difference is that the EN of C, H, and O aren't strong enough to cause one atom to give up its electrons, preventing the formation of a genuine ionic connection. As a result, glucose 's bonds are completely covalent.
The bulk of compounds that we come into contact with in daily life are formed in a completely different way than the formation of bonds through the transfer of electrons. The atoms are joined by covalent bonds. When electrons are shared, a covalent bond is created. A molecule is a collection of atoms that are covalently connected. These molecules include carbon dioxide, glucose, and DNA. The number of atoms in the molecules might range from 2 to a million. Each glucose molecule has 24 covalent bonds, whether they are in linear or cyclic form.
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Mario was attempting to develop a cure for the flu. Mario gave three test subjects, all sick with the flu, massive doses of vitamin C. All three subjects recovered within a week. Mario concluded that massive doses of vitamin C will cure the flu.
Why did the scientific community deem Mario's research to be invalid?
Responses
A Vitamin C, in any amount, is harmful to humans.Vitamin C, in any amount, is harmful to humans.
B Three test subjects is not a large enough sample size.Three test subjects is not a large enough sample size.
C Trying to develop a cure for the flu should never be attempted.Trying to develop a cure for the flu should never be attempted.
D Mario must have changed the data
Choice B is correct here. Especially when experimenting with illnesses like the flu, three test subjects is not sufficient enough. Cures can change based on age, size, gender, etc. In addition, everyone's body reacts different to illness cures, meaning he needs to test more subjects before fully concluding that Vitamin C is a cure.
one or more extra whole sets of chromosomes is called choose... , which often is beneficial in plants.
The answer to the question is polyploidy. Polyploidy refers to the presence of more than two sets of chromosomes in an organism's cells. It is common in plants and often results in larger and more robust individuals with improved growth and reproduction.
Hybridization is a natural process that can lead to polyploidy. Colchicine treatment is an artificial procedure that can lead to polyploidy. Increased growth, improved resilience to stressors like disease and drought, and higher genetic variety are all advantages of polyploidy in plants. New species may evolve as a result, and crops with higher yields and higher quality may arise.
Although polyploidy can have unfavorable effects, such as decreased fertility brought on by problems with chromosomal pairing during meiosis, it is nonetheless a crucial process for plant evolution and adaptability. For farming, conservation, and evolutionary biology, it's critical to comprehend the genetic and ecological effects of polyploidy.
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does anyone know how cell science changed after matthias schleiden found out that all plants have cells i will pick u for brainliest and i give u 25 points
Matthias Schleiden, along with Theodor Schwann, were among the first scientists to propose the cell theory, which states that all living organisms are composed of one or more cells, and that the cell is the basic unit of life. Schleiden's discovery that all plants are made of cells was a crucial step in the development of the cell theory. This led to the realization that the same basic structures and functions were shared by all living things, and that the study of cells was central to understanding biology. It also paved the way for advances in microscopy and other technologies that allowed scientists to study cells in greater detail, leading to new discoveries about cell structure, function, and behavior. The cell theory has since become a cornerstone of modern biology, and has had far-reaching implications for our understanding of living systems, including human health and disease.
HELP PLEASE: Which of the following would be considered a theory?
A. Animal research is more effective in labs that are outdoors
B. The universe was created from a single massive explosion
C. Nuclear energy should be widely used to produce energy
D. A cold front will arrive in 6 hours and result in heavy rain
Answer:
B. The universe was created from a single massive explosion
Explanation:
That is actually the Big Bang Theory
Answer:
B
Explanation: b is the only answer there that could be considered as a theory
question content area top part 1 what is a common term used to describe the items needed for standard precautions or body substance isolation precautions?
The common term used to describe the items needed for standard precautions or body substance isolation precautions is Personal Protective Equipment (PPE).
PPE are items or clothing worn by healthcare personnel to protect themselves and/or the patient from the transfer of microorganisms, body fluids, or other potentially infectious material. These items include, but are not limited to, gloves, gowns, masks, eye protection, face shields, and shoe coverings. PPE must be chosen based on the specific procedures being performed and the risk of exposure to infectious materials. It is important to note that PPE alone is not enough to protect healthcare personnel from infectious material and should be used in conjunction with proper hand hygiene and other infection control practices.
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which anticoagulant is superior in preventing clot formation but is also a known teratogen and should not be used during organogenesis
Warfarin is an anticoagulant that is superior in preventing clot formation but is also a known teratogen and should not be used during organogenesis.
Warfarin is commonly used to treat and prevent blood clots, such as deep vein thrombosis and pulmonary embolism. Warfarin works by inhibiting the synthesis of vitamin K-dependent clotting factors, which are necessary for blood clotting.
While warfarin is an effective anticoagulant, it can also cross the placenta and cause fetal bleeding, malformations, and developmental delays if used during pregnancy, particularly during the period of organogenesis when the fetus is developing its organs.
For this reason, warfarin is not recommended for use in pregnant women or women who are planning to become pregnant. Instead, alternative anticoagulants, such as heparin, may be used during pregnancy to prevent blood clots.
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Heyy i need your help pleasee
Classify the following organs or organisms into two groups, those that are autotrophic
and those that are heterotrophic: human - mushroom - apple tree - apple - root - cactus
- jellyfish - leaf
Answer:
Autotrophic: Apple tree, Leaf
Heterotrophic: Human, Mushroom, Apple, Root, Cactus, Jellyfish
Explanation:
Autotrophic organisms are able to produce their own food using energy from the sun, water, and carbon dioxide, through the process of photosynthesis. In contrast, heterotrophic organisms cannot produce their own food, and instead must obtain nutrients and energy from other sources, such as other organisms or organic matter.
Answer:
Autotrophic: Apple tree, Cactus, Leaf
Heterotrophic: Human, Mushroom, Apple, Root, Jellyfish
Select the statement(s) that accurately summarize the scientific method.
Scientists think of interesting questions to attempt to answer after formulating a hypothesis.
Scientists perform investigations to gather data and make observations as forms of evidence.
During the scientific investigation, scientists cannot refine, change, or expand the investigation to sufficiently investigate and collect data.
Data is needed to help scientists either prove or disprove a hypothesis.
Throughout the entire process, scientists take detailed notes of their procedures so it can be repeated again either by themself or other scientists.
In a scientific method, scientists proceed with investigations to gather data and make observations as forms of evidence, and during the entire process, scientists take detailed notes of their procedures, hence options C and D are correct.
What is the scientific method?The scientific method is the method of objectively maintaining facts during testing and experimentation.
There are two methods that correctly summarize the scientific method:
Scientists perform observations to collect data and make observations as forms of evidence.During the entire process, scientists take detailed writings of their procedures so they can be observed again either by themself or by other scientists.Therefore, options C and D are correct.
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Green anoles are lizards that can change their skin color rapidly in response to various stimuli. this adaptation is the result of:________
'Green anoles are lizards that can change their skin color rapidly in response to various stimuli. this adaptation is the result of beneficial traits passed on from parents to offspring.
What is the evolutionary process of natural selection?The evolutionary process of natural selection is a natural mechanism by which organisms show differential survival and reproduction rate and it is associated with the transference of characters across generations.
Therefore, with this data, we can see that the evolutionary process of natural selection is fundamental to reaching the transmission of hereditary features in different generations.
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Question: What is the effect of day length on plant
growth?
Hypothesis: Plants will grow more when the day is
longer.
Answer: Yes
Explanation: Its the sun which is prevalent during the day because thats how photosynthesis occurs and takes place with the plant .
There are two ways in which organisms can obtain energy: oxidize reduced chemicals obtained from the environment, while harvest light energy. True or false?
There are two ways, one is by photosynthesis and another is by oxidation organism gets energy, hence the given statement is true.
What is photosynthesis?Photosynthesis is the process by which organism makes chemical compounds by using light energy. This is the main process of the autotrophs through which they make their own food.
In this process, energy is made by solar energy converted into an organic compound, that is used by plants and other organisms, that used to eat.
Therefore, oxidizing reduced chemicals obtained from the environment while harvesting light energy is the main way in which organisms can obtain energy.
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in the traditionally accepted model of upr initiation, What activates the UPR?
The UPR is not engaged under normal circumstances, but it can become active in response to specific stimuli, like as hypoxia or altered glycosylation, because of a buildup of unfolded proteins.
The unfolded protein response is triggered by ER stress (UPR). Although the UPR works to reduce ER stress, it can potentially result in cell death if it is sustained. In the ER membrane, there are at least three ER stress sensors: IRE1, PERK, and ATF6.
The endoplasmic reticulum (ER) is a dynamic intracellular organelle that performs a variety of vital tasks for cellular growth, homeostasis, and stress resistance. Unfolded protein response (UPR), a well-known signalling cascade, is triggered in response to cellular stress. Three ER transmembrane proteins, Activator model, PKR-like ER kinase (PERK), and Inositol Requiring 1 (IRE1), start the UPR.
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the main trait that animals have in common with plants and fungi is that they are all multicellular eukaryotes. which of these traits distinguishes animals from plants and fungi?
While animals, plants, and fungi share many similarities as multicellular eukaryotes, the ability to move actively, being heterotrophic, and possessing specialized cells are traits that distinguish animals from plants and fungi.
As per the question given,
While animals, plants, and fungi are all multicellular eukaryotes, they differ in many ways. One trait that distinguishes animals from plants and fungi is the ability to move actively. Animals have specialized muscle cells that allow them to move in search of food, mates, and shelter, while plants and fungi generally stay rooted in place.
Additionally, animals are heterotrophic, meaning they must consume other organisms to obtain nutrients, while plants and fungi are autotrophic, meaning they can produce their own food through photosynthesis or other means.
Another distinguishing feature is the presence in animals of specialized cells, such as nerve cells, muscle cells, and specialized sensory cells, that enable them to perceive and respond to their environment. Plants and fungi lack these specialized cells and rely on different mechanisms to respond to their environment.
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complete the photosynthesis reaction by placing the compounds and energy sources into the reaction as reactants or products. one molecule will not be placed.
Reactants in the photosynthetic reaction include water, light energy, and carbon dioxide. Plants convert carbon dioxide, water, and sunshine into oxygen and sugar-based energy through a process called photosynthesis.
The term "photosynthesis" is most frequently abbreviated as 6CO₂ + 6H₂O C₆H₁₂O₆ + 6O₂.
This shows that the conversion of the reactants—six molecules of carbon dioxide and six molecules of water—into the products—a sugar molecule and six molecules of oxygen—takes place as a result of chlorophyll's absorption of light energy (implied by the arrow).
The three phases of the photosynthetic cycle are as follows: Chlorophyll absorbs light energy and splits water molecules into oxygen and hydrogen. Chemical energy is created from light energy. Carbohydrates are produced as a result of the reduction of carbon dioxide.
The following are the three stages of photosynthesis: the assimilation of sunlight The pigment's chlorophyll absorbs sunlight. water fracturing Light breaking water into two molecules of hydrogen and oxygen and converting to chemical energy.
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The presence of an epiphyseal line on an x-ray indicates that the bone has stopped growing in length. (True or False)
Answer: The line is visible on an X-ray as a dark line running parallel to the bone. The epiphyseal line is made up of cells that divide and grow, allowing the bone to lengthen. When the bone reaches its full adult size, the epiphyseal line disappears as the bone stops growing.
Explanation: The line is visible on an X-ray as a dark line running parallel to the bone. The epiphyseal line is made up of cells that divide and grow, allowing the bone to lengthen. When the bone reaches its full adult size, the epiphyseal line disappears as the bone stops growing.
The stripes in skeletal muscle are due to the presence of Multiple Choice a. multiple nuclei per cell. b. actin and myosin filaments intercalated disks. c. the branching of cells, d. tendons connecting the muscle to bone.
The stripes in skeletal muscle are due to the presence of actin and myosin filaments intercalated disks. Therefore, the correct option is B.
What are skeletal muscles?Skeletal muscles are the voluntary muscles of the body that helps the body to move and provides support to the body. They are typically attached by the tendons to the bones of the skeletal system.
The skeletal muscle fibers have stripes which are called striations, which are formed due to the myofibrils. The basic unit of striated (striped) muscle is a sarcomere comprised of actin (light bands) and myosin (dark bands) filaments. Therefore, the correct option is B.
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Help with us please…..
Based on the pedigree, the pattern of inheritance is X-linked recessive.
The correct option is B.
What is an X-linked recessive trait?When a gene on the X chromosome is mutated, the trait is always displayed in men and in females who are homozygous for the mutation; this pattern of inheritance is known as X-linked recessive inheritance; see also zygosity. Carriers are females who have one copy of the mutant gene.
In the pedigree shown, since some male offspring do not have the trait, the trait is an X-linked recessive trait.
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what happens in anaphase of mitosis
Every chromosomal pair splits into two identical, independent chromosomes during anaphase. The mitotic spindle, a component of the cell, divides the chromosomes.
The division of the duplicated genetic material contained in a parent cell's nucleus into two identical daughter cells is known as anaphase, which is the fourth stage of the mitotic process. Each pair of chromosomes splits into two identical, separate chromosomes during anaphase. A structure known as the mitotic spindle separates the chromosomes. The microtubules, which make up the mitotic spindle and are connected to a chromosome at one end and the cell pole at the other, are numerous long proteins that are found in cells. During this process, the centromeres of the sister chromatids split concurrently. Afterward, the spindle pulls the separated chromosomes to the cell's opposite poles.
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the uterine wall is composed of three tissue layers; the middle layer is called the ____.
The middle layer of the uterine wall is called the myometrium. It is a thick layer of smooth muscle that contracts during labor and helps to expel the fetus.
The myometrium is sandwiched between the innermost layer, the endometrium, and the outermost layer, the perimetrium. The myometrium is the middle layer of the uterine wall, consisting mainly of smooth muscle tissue. It is responsible for the contraction and relaxation of the uterus, which is important during menstruation, childbirth, and postpartum recovery.
During menstruation, the myometrium contracts to shed the endometrial lining and expel menstrual blood from the uterus. During pregnancy, the myometrium provides the muscular support needed for fetal growth and development. It also helps to dilate the cervix during labor and expel the fetus during delivery.
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