The three statements on which modern cell theory is based are:
All living things are made of at least one cell.
The cell is the smallest living unit of all organisms.
All cells come from other pre-existing cells.
The options A, C, and D are not correct statements of modern cell theory.
14.Base of heart is related to :
a. Diaphragm
b. Fundus of stomach
c. Left lobe of liver
d. Oesophagus
e. Phrenic nerve
The correct answer is
A.Diaphragm
what is environmental scanning?
Answer: Environmental scanning is about understanding the world and context in which you operate. It is a process for monitoring your internal and external environment for clues to existing circumstances and change that could bring about risk or opportunities.
Explain how the history of the development of the cell theory is related to the scientific process?.
The invention of the microscope made it easier for Hooke to find the cell. By researching cork, Hooke noticed formations that resembled monastic cells or flats and named them "cells" because of their box-like shape.
This discovery gave rise to the classical cell hypothesis. The classical cell theory was put forth by Theodor Schwann in 1839. There are three elements to this hypothesis. According to the first section, cells make up all living things. Cells are, according to the second section, the fundamental constituents of life. In 1858, Rudolf Virchow used the phrase "omnis cellula e cellula" to refer to the third part of his theory, which holds that new cells develop from previously existing ones that have multiplied (all cells come from cells).
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lthough alveolata possess traits shared by other protista groups, for example, blank such as in amoebozoa, blank such as in algae, or blank such as in stramenopila, they have a distinct trait that distinguishes them from others: blank, called alveoli. the presence of blank traits supports the claim that protist diversity is the result of a series of morphological innovations.
Although alveolaa postsess traits shared by other protista groups, such as membrane-bound organelles such as in amoebozoa, photosynthetic pigments such as in algae.
What is alveolaa ?Alveoli are tiny air sacs in the lungs that are responsible for facilitating the exchange of oxygen and carbon dioxide. They are the smallest and most numerous parts of the respiratory system. Alveoli are found within each lobe of the lungs, and are surrounded by a capillary network. When we inhale air, the air travels through the trachea and bronchi, before entering the alveoli.
The presence of such unique traits supports the claim that protist diversity is the result of a series of morphological innovations. Over time, new traits were acquired or modified from pre-existing ones, allowing organisms to adapt to their environment and diversify into new forms.
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junctional epidermolysis bullosa is a severe skin disorder that results in blisters over the entire _____.
Junctional epidermolysis bullosa is a severe skin disorder that results in blisters over the entire body.
Microorganisms are given names that describe the environments in which they live. Match each bacterial name to the correct environmental parameter.
Alkaliphiles grow above pH 9, halophiles grow in high salinity environments, and barophiles grow under high pressure.
What are microbes and what do they do?
Everywhere in the ecosystem, microorganisms play a crucial part in a variety of natural processes. Among other things, they run the fundamental drug cycles required for the plants to get the nutrients they need from the reaction of organic matter in the earth.
Alkaliphiles are bacteria that can thrive in settings with a high pH (> 9) level. It is possible to distinguish between two distinct physiological groups: true alkaliphiles, which require pH 9 for optimum growth, and haloalkaliphiles, which flourish at both pH higher than 9 and high salinity. While barophile microbes can endure high pressures, they can also thrive in less extreme conditions.
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Write a 3 paragraph (4-5 sentences per paragraph) “persuasive essay” to convince your reader
that Rosalind Franklin was absolutely robbed of the Nobel Prize
Rosalind Franklin was an important and influential scientist who made significant contributions to the field of molecular biology.
The idea that she was "robbed" of the Nobel Prize is not entirely true. Her work on X-ray crystallography helped determine the structure of DNA, but was not the only factor in her discovery. Up to three Nobel Prizes have been awarded to James Watson, Francis Crick and Maurice Wilkins for their contributions to the discovery of the structure of DNA.
It's important to recognize that the scientific community is collaborative and no one person can be responsible for discoveries. Franklin's work was certainly worthwhile, but she wasn't the only scientist working on the problem. Watson, Crick, and Wilkins all made important contributions to the discovery of DNA structure. Furthermore, Franklin's premature death in 1958 prevented her from winning the Nobel Prize, even if she did.
Ultimately, although Franklin's contribution to the discovery of her DNA structure was significant, it would be inaccurate to say that she was "robbed" of the Nobel Prize. She said the prize was given to the scientist who led to her discovery, but unfortunately Franklin didn't live to win the prize, even though she did. It is important to recognize the contributions of all the scientists involved in the discovery, rather than just evaluating one scientist.
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Which statement accurately describes sickle cell anemia? (1 point)
O It affects the functions of red blood cells of humans.
O It emerges in humans without the influence of mRNA.
O It emerges in humans without the influence of DNA.
O It affects transcription and translation in humans.
It affects the function of a person's red blood cells and accurately describes sickle cell anemia.
What are the symptoms of sickle cell disease?Sickle cells, which block blood flow to organs, deprive affected organs of blood and oxygen. Sickle cell anemia also has a chronically low level of oxygen in the blood.
People with sickle cell disease inherit two defective hemoglobin genes called hemoglobin S - one from each parent. A person has sickle cell trait when the hemoglobin S gene is inherited from only one parent and the normal hemoglobin gene - hemoglobin A - from the other parent.
In a recent study, the life expectancy of adults with SCD was estimated to be 5 years, about 20 years shorter than that of normal adults without SCD.
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What do these images model?
Ο Α. atoms
B. compounds
O. C. elements
O:D. mixtures
Reset
Next
Answer:
The answer would be D: Mixtures
Answer:
B
Explanation:
a) Atoms are singular
b) Additional different atoms that are chemically combined
c)elements a singular atoms with a chemical name. e.g hydrogen
d)Mixtures are elements physical combined
Choose the correct statement:
a. Populations that follow all assumptions of Hardy-Weinberg Equilibrium (HWE) evolve faster than those that violate at least one assumption of HWE.
b. Populations that follow all assumptions of HWE evolve slower than those that violate at least one assumption of HWE.
c. Populations that do not violate HWE assumptions cannot evolve.
d. Populations that violate HWE assumptions cannot evolve.
Populations that do not defy HWE presumptions are incapable of evolving. According to the Hardy-Weinberg equilibrium, a population's genetic diversity will not change over time.
Why Hardy-Weinberg equilibrium exists:The Hardy-Weinberg Equilibrium (HWE), which states that "in the absence of external disturbance, genotype frequencies in a population maintain constant between generations," is a fundamental concept of population genetics.
What are the Hardy-Weinberg equilibrium's five guiding principles?A population is not evolving and allele frequencies do not change over time when it enters Hardy-Weinberg equilibrium for a gene. There are no mutations, random mating, no gene flow, an unlimited population size, and no selection, according to the five fundamental Hardy-Weinberg hypothesis.
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A structure that develops within the reproductive leaves of a seed plant and contains the female gametophyte is called
Answer:
The structure that develops within the reproductive leaves of a seed plant and contains the female gametophyte is called the ovule.
Explanation:
The ovule is the precursor to the seed, and it contains the female reproductive cells of the plant, including the egg cell.
After fertilization, the ovule develops into a seed, which contains an embryo and a food source for the developing plant.
The ovule is an important part of the reproductive system of seed plants, including gymnosperms and angiosperms.
When using punnett squares to determine the patterns of inheritance of an organism, the phenotype of an individual is determined by his or her.
An individual's phenotype is determined by his or her genotypes when utilizing Punnett squares to analyze the inheritance patterns of an organism.
A Punnett square is a tabular representation of the genotypes of a generation produced by crossing its parents' genotypes. The number of genotypes produced depends upon the gametes produced from the gametes. If it's a monohybrid cross, there would be four gametes possible in total, while in that of a dihybrid cross, the gametes would be 8.
We can determine the phenotype of an organism by knowing its genotypes. If it's homozygous, the phenotype may be recessive or dominant such as tallness in pea plants. Whereas, if the genotype is heterozygous, the phenotype would be dominant in most cases.
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which of the following statements about ribozymes is/are correct? select all that apply. which of the following statements about ribozymes is/are correct?select all that apply. a ribosome can be regarded as one large ribozyme. in some genes, intron rna functions as a ribozyme and catalyzes its own excision. ribozymes are rna molecules that function as enzymes.
A. Ribozymes are RNA molecules that function as enzymes.
B. In some genes, intron RNA functions as a ribozyme and catalyses its own excision are the two correct statements about Ribozymes.
What are Ribozymes?Ribozymes are RNA molecules that are capable of catalysing specific biochemical reactions. They are a type of ribonucleic acid (RNA) that functions as an enzyme, and they play a role in a wide range of cellular processes, such as gene expression, protein synthesis and RNA processing. Ribozymes are formed from the cleavage of larger precursor RNA molecules, and they are able to catalyse reactions such as hydrolysis, phosphorylation, and ligation. Ribozymes have been found in both prokaryotes and eukaryotes, and are involved in a variety of biological processes.
A. Ribozymes are RNA molecules that function as enzymes. This means that they can catalyse biochemical reactions and can be used in the same way as enzymes.
B. In some genes, intron RNA functions as a ribozyme and catalyses its own excision. This means that some types of RNA can act as ribozymes and can catalyse the process of excising themselves from a gene.
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elect features of protists in the supergroup excavata. multiple select question. they move using flagella. many possess a feeding groove. they are all photosynthetic. some have lost their nucleus.
The features of subgroup Excavata include presence of flagella, and also a feeding groove. Thus, the correct options are A and B.
What are Protists?A protist is any eukaryotic organism which is not an animal, plant, or fungus. While, it is most likely that the protists share a common ancestor, the exclusion of other eukaryotic organisms means that the protists do not form a natural group, or clade.
Excavata are a supergroup of protists which are defined by an asymmetrical appearance within a feeding groove which is excavated from one side and it includes various types of organisms which are usually parasitic, photosynthetic and heterotrophic predators. The organisms of excavata group has a mitochondria and a well-defined nucleus.
Therefore, the correct options are A and B.
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which of the following substances cannot prevent coagulation when directly added to a blood sample (i.e., in a test tube)?
Red blood cells (RBCs) cannot prevent coagulation when directly added to a blood sample. In fact, RBCs are involved in the process of coagulation as they release substances that promote clotting.
Other substances such as heparin and citrate can prevent coagulation when added to a blood sample.
Why do fungi have a gap between cytoplasm and nuclear fusion?
Fungi have a gap between cytoplasm and nuclear fusion to prevent genetic conflicts between nuclei from different mating types.
How do fungi use the gap between cytoplasm and nuclear fusion to regulate gene expression?Fungi use the gap between cytoplasm and nuclear fusion to regulate gene expression by allowing different nuclei to control the expression of different sets of genes, leading to functional differentiation and specialization within the organism.
How does the gap between cytoplasm and nuclear fusion affect the ability of fungi to adapt to changing environments?The gap between cytoplasm and nuclear fusion in fungi allows for the rapid adaptation to changing environments by promoting genetic diversity through the exchange of nuclei between individuals or through the formation of hybrid individuals with novel genetic combinations. This increases the likelihood that at least some individuals will be well-suited to survive and thrive in the new environment.
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True or false: If false, please make it a correct statement.
The lysosome is the site of synthesis of various large biological molecules.
False. The lysosome is the site of synthesis of various large biological molecules.
Why is the above statement false?The creation of a number of major biological compounds does not take place in the lysosome. Instead, it is an organelle that may degrade and recycle a variety of macromolecules, including proteins, nucleic acids, lipids, and carbohydrates. It is a component of animal cells. Proton pumps that actively transport hydrogen ions into the lysosome maintain the acidic environment necessary for these enzymes to function at their best. Although the lysosome does not participate in the production of new molecules, it is essential for maintaining cellular homeostasis and reducing the buildup of waste products since it breaks down and recycles molecules.
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put the following in order from smallest to largest, gene,cell,chromosome,DNA
Answer:
gene, DNA; chromosome, cell
Explanation:
DNA is a macromolecule, a gene is a sequence of DNA monomers(nucleotides), the chromosome is a large structure made of highly condensed DNA material around proteins(histones) and the cell contains everything listed and much more.
please select the characteristics which have traditionally been used to place plants, animals, and fungi into separate kingdoms.
Plants, animals, and fungi have been divided into distinct kingdoms based on the following characteristics: Kind of cell, nourishment method, reproduction, and bodily organization.
What traits are commonly used to categorize protozoans from the outset?The ameba, flagellates, ciliates, and sporozoa were once considered to be the four main types of protozoa. Motility served as the basis for the identifying characteristics between the groups (i.e., ameboid, flagella, cilia).
Which of these traits do fungi and animals both share frequently?Animals and fungi are both classes of living things formed of intricate eukaryotic cells. Both have the capacity for reproduction and carry genetic information that is passed on. Fungi and animals both expand and change.
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What does RNA stand for?
Answer:
the answer isRibonucleic acid.
Cross a heterozygous parent with a homozygous dominant parent. What is the genotypic ratio? What is the phenotypic ratio?
Answer: genotype, 2:1, phenotype, 9:3:3:1
Explanation:
true/false. peristalsis is repeated waves of contractions of circular muscles which prevent food from moving backward in the esophagus, but segmentation in the small and large intestines shifts food back and forth along the intestinal walls.
Peristalsis is repeated waves of contractions of circular muscles which prevent food from moving backward in the esophagus, but segmentation in the small and large intestines shifts food back and forth along the intestinal walls. It is true
What is peristalsis?
Peristalsis is a series of wave-like muscle contractions that move food through the digestive tract. The contractions are involuntary and help to push food forward in one direction. Peristalsis occurs in various parts of the digestive system, including the esophagus, stomach, and intestines. It is an important process in digestion and helps to ensure that food is properly broken down and absorbed by the body.To know more about peristalsis, click the link given below:
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kangaroo care provided to the low birth-weight babies demonstrates the value of _____ when caring for at-risk newborns.
Kangaroo care provided to the low birth-weight babies demonstrates the value of parental care when caring for at-risk newborns as presented in Option A, as parental care is different from that provided by the different animals.
What is parental care?Parental care is seen in mammals and other classes as they care for newborn babies, such as humans who take great care of their babies or kangaroos who care for their babies after they are born and provide them with the nutrition they require to grow.
Hence, kangaroo care provided to the low birth-weight babies demonstrates the value of parental care when caring for at-risk newborns, as presented in Option A.
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The question is incomplete, the complete question is below
kangaroo care provided to the low birth-weight babies demonstrates the value of _____ when caring for at-risk newborns.
A)parental care
B)no parental care
What is the best malaria parasite population resistance on amplify?!?!
The best malaria parasite population resistance on amplify is drug-resistance mutations.
What is malaria parasite population?
Malaria parasite population refers to the total number of malaria parasites present in a given region. Malaria is a serious and potentially life-threatening disease caused by a parasite that is transmitted through the bite of an infected mosquito. Malaria parasites reproduce rapidly in the human body and can quickly spread from person to person. The number of malaria parasites in a given region can vary greatly depending on the climate, season, and other factors.
Drug-resistance mutations enable the parasite to survive treatment with antimalarial drugs, while gene amplification increases the expression of genes that promote drug resistance. This combination of mutations and gene amplification gives the parasite the ability to survive in the presence of antimalarial drugs and effectively resist treatment.
Therefore, drug-resistance mutations is the answer.
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When using povidone-iodine to cleanse the site for a blood culture, how long should you swab the site for with the first swab?
30 seconds
5 minutes
1 minute
2 minutes
Unless you are preparing for a blood collection or taking blood cultures, wipe the area for 30 seconds with a 70% alcohol swab and then wait until it is fully dry (40–42).
How long should the blood culture site be swabbed?Take one set of blood cultures from each indwelling line and from a peripheral stab (arterial, central line, PICC). Two bottles, one anaerobic and one aerobic make up each set of blood cultures. Within 15 minutes, cultures should be collected from all locations.
If a blood culture procedure is carried out How much time should be given for the iodine or chlorhexidine to dry before inserting the needle?Give the area time to totally dry, or at least for 30 seconds an hour. Two-step process (use the following process, which takes about two minutes, if chlorhexidine gluconate in 70% isopropyl alcohol disinfection is not available):
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HELPPPPPPPPPPPPPPPPP
Compass Rose - Okay, so this is a true yes. It literally tells you which direction is North, East, South, and West. You can always remember this by the phrase of Never Eat Soggy Waffles.
Legend - Okay, so this is a no. Legends tell you about specific symbols located on a map, not direction.
Latitude and Longitude Lines - No. So, these lines refer to a coordinate point on the world map, this does not indicate direction. These lines are helpful for if someone gave you a coordinate point to look for.
Arrow pointing north - Yes, this can indicate a direction, especially since it points North.
Answer:
A and D
Explanation:
Only Compass Nose and Arrow pointing North
Ecotherms change their temperature by modifying their behavior True or false
How does the presence of lactose affect the lac operon system in E. coli?
a. Lactose binds to RNA polymerase, activating it to begin transcription.
b. Lactose binds to the repressor, changing its shape so that it cannot block transcription.
c. Lactose triggers the expression of other proteins that break down repressors to start transcription.
d. Lactose breaks down repressor proteins so that transcription can begin.
Lactose binds to RNA polymerase, activating it to begin transcription. So, the correct option is A.
What is Lac operon?The lactose operon is defined as a type of operon that is essential for the transport and metabolism of lactose in E. coli and many other enteric bacteria. The lactose operon of E. coli is a classic example of an operon that is used when discussing prokaryotic regulation.
When lactose is present, the lac repressor loses its DNA-binding ability which clears the way for RNA polymerase to bind the promoter and transcribe the lac operon.
Therefore, the correct option is A.
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Answer: lactose binds to the repressor, changing it's shape so that it cannot block transcription .
Explanation: i took the test and put the answer that the person above gave me and it was wrong !
Is catalase an anabolic enzyme or a catabolic enzyme? How do you know?
Catalase is a catabolic enzyme. It is responsible for breaking down hydrogen peroxide into water and oxygen, which is a process that releases energy. Catabolic reactions break down complex molecules into simpler ones and release energy, whereas anabolic reactions build complex molecules from simpler ones and require energy input. Since catalase is breaking down a molecule, it is considered a catabolic enzyme.
Theories change as new information becomes available. Which actions are most likely to lead to the discovery of new information?.
The actions that will lead to the discovery of new information are: (3) repeating an experiment using the latest technology; (4) developing a new experimental method to test an existing hypothesis.
Discovery is defined as the process of finding something new that did not exist before. It can be the discover of some phenomena, mechanisms, cures, technologies, theories, etc. New patterns and correlations are e stablished to discover something.
Experimental method is the process of conducting research in well thought and designed conditions in order to obtain some result which may be helpful in proving or disproving some hypothesis. These methods very often lead to the discovery of something new.
The given question is incomplete, the complete question is:
Theories change as new information becomes available. Which actions are most likely to lead to the discovery of new information? Check all that apply.
repeating experiments using the same experimental method each timerepeating experiments using the technology available at the time of the original experimentrepeating an experiment using the latest technologydeveloping a new experimental method to test an existing hypothesisTo know more about experimental methods, here
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