(c) Prokaryotes, mitochondria, and Chloroplasts all have DNA and ribosomes provides the best evidence for the Endosymbiotic theory of the origin of Eukaryotes.
The Endosymbiotic theory proposes that eukaryotic cells originated from A symbiotic relationship between two or more prokaryotic cells. Specifically, it suggests that the mitochondria and chloroplasts of Eukaryotic cells were once free-living bacteria that were engulfed by Larger host cells and eventually evolved into organelles.
The presence of DNA and ribosomes in both prokaryotes and Mitochondria/chloroplasts is a crucial piece of evidence in support of this Theory. This is because DNA and ribosomes are essential components of All living cells and are responsible for the synthesis of proteins, the Building blocks of life.
Therefore, c) Prokaryotes, mitochondria, and Chloroplasts provides the Best evidence for the Endosymbiotic Theory of the origin of Eukaryotes.
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A centrifuged sample of blood shows the following volume fractions: 53% plasma, 1% buffy coat, and 46% erythrocytes. What percent of the blood is composed of leukocytes and platelets? A. 46% B 539 C.1% D.47%
1% of the blood is composed of leukocytes and platelets. So, option (c) is correct.
What is blood?
A tissue made up of white blood cells, platelets, red blood cells, and other elements suspended in liquid. Blood transports wastes and carries nutrients and oxygen to the tissues.
What is leukocytes ?
Your body's defense against infection is provided by white blood cells, also referred to as leukocytes.
Therefore, 1% of the blood is composed of leukocytes and platelets. So, option (c) is correct.
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explain why a slow growing forest can have a very low npp and yet store a massive amount of biomass (have a high standing crop).
Slow-growing forests can have a low net primary production (NPP) yet store a large amount of biomass because of their slow growth rate.
This is due to the fact that slower-growing forests have a higher likelihood of accumulating biomass over a longer period of time since less biomass is lost to breakdown and other processes.
Although carbon is released into the atmosphere more slowly in slow-growing forests, there is a tendency for these forests to have larger carbon concentrations in their biomass.
Because of this, forests can store more biomass even when their rates of growth and photosynthesis are low.
As for their higher biomass and carbon storage, slow-growing forests also tend to be more resistant to disturbances like wildfires or insect infestations. As a result, despite having a low NPP, they may store a lot of biomass.
Complete Question:
Why can a slow-growing forest have a very low net primary production (NPP) yet store a large amount of biomass (have a high standing crop)?
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accoriding to genesis 1:29-31, how does god use photosynthesis to provide for life all over the world?
God uses photosynthesis to provide for life all over the world by using energy from the sun to convert carbon dioxide and water into oxygen and glucose.
This process is called photosynthesis and it is how plants, algae, and some bacteria are able to produce their own food from sunlight. This food is then used to create energy for the plants, and when the plants die and decompose, the energy is released back into the atmosphere as carbon dioxide. This process provides the oxygen that all life on Earth needs to survive, and it also recycles carbon dioxide back into the atmosphere to be used again. The recycling of carbon dioxide is essential for maintaining the balance of oxygen and carbon dioxide in the atmosphere, which is necessary for life to exist on Earth.
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which of the following methods of transport are considered to be bulk transport? multiple select question. facilitated diffusion receptor-mediated endocytosis pinocytosis the sodium-potassium pump osmosis phagocytosis
Exocytosis and endocytosis, two different kinds of bulk transport, both demand the use of energy (ATP).
What is endocytosis in biology?Christian deDuve first used the term "endocytosis" in 1963 to refer to both the intake of fluids or macromolecules in small vesicles as well as the digestion of big particles (like bacteria). Both of these processes are known as pinocytosis and phagocytosis, respectively (cell drinking).
What are two types of exocytosis?Each cell performs this function. Constitutive exocytosis transports lipids and proteins from inside the cell to the surface and expels materials to the outside. The evacuation of materials from vesicles occurs through regulated exocytosis, which depends on the presence of extracellular signals.
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what is true of mobile electron carriers
The mobile electron carriers are ferry electrons between one respiratory complex and the next. So, the correct choice is option(d).
The electron transport chain (ETC), which functions in the mitochondrial membrane, consists of four protein complexes and two mobile electron carriers. Mobile electron carriers are small proteins or hydrophobic molecules that make up the respiratory chain. Electron carriers play a central role in many biological processes, including cellular respiration. During cellular respiration, electrons from glucose molecules are captured by electron carriers. After going through several steps, glucose is broken down and energy is gradually produced through the electron transport chain. Thus, a molecule can accept one electron from another molecule (electron donor) and in the process of electron transfer can carry electrons to donate to another molecule. NAD⁺ (Nicotinamide adenine dinucleotide) is an example of an electron carrier. So option (d) is the correct answer.
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Complete question :
what is true of mobile electron carriers?Choose one:
a) They transfer electrons to oxygen to produce water.
b) They pump protons across a membrane.
c) They feed electrons into the electron-transport chain.
d)They ferry electrons between one respiratory complex and the next.
e) They accept electrons from NADH.
What is definition of gamete in biology?
A gamete is a reproductive cell that combines with another gamete during fertilisation (conception) in organisms that reproduce sexually.
The reproductive cells of an organism are called gametes, and they hold half of the genetic material needed to make a new person.
Male and female gametes in humans are represented by sperm and egg cells, respectively. A new person with a distinct genetic make-up is created during fertilisation when the male and female gametes mix.
Being haploid cells with only one pair of chromosomes, gametes are. The 23 chromosomes in humans make up half of the 46 chromosomes found in somatic (body) cells.
Meiosis, which decreases the number of chromosomes by half, is the procedure used to create gametes. This is crucial for maintaining genetic diversity and avoiding the inheritance of an excessive number of recessive genes by offspring.
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how the passive transport low to high
Passive transport occurs when substances move from a high concentration region to a low concentration area through a process known as diffusion.
A concentration gradient is a physical space in which the concentration of a particular substance varies. Active transport is the movement of molecules across a cell membrane in the opposite way of their concentration gradient, from low to high concentration.
Substances move against the concentration gradient during active transport, from a low concentration region to a high concentration area. This procedure is considered "active" because it necessitates the use of energy (usually in the form of ATP). It is the polar antithesis of passive transportation.
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Which level of biodiversity may still be reduced after a species recovers from a threat to its survival?a. ecosystem diversityb. genetic diversityc. population diversityd. species diversity
Genetic variation will just leisurely be reestablished through the aggregation of transformations over numerous ages. The correct answer is (b) genetic diversity.
Consequently, a jeopardized species with low hereditary variety might take a chance at eradication long after its populace size has recuperated.
Researchers frequently talk about three degrees of variety: species, genetic, and biological system variety. These levels can't be isolated, as a matter of fact. Each is significant, communicating with and impacting others. Changes at one level can cause changes at different levels.
Generally, three degrees of biodiversity are talked about — hereditary, species, and biological system variety. Hereditary variety is every one of the various qualities contained in every single individual plant, creature, organism, and microorganism. It happens inside an animal category as well as between species.
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which side are motor deficits expected from an internal carotid artery occlusion
ICA occlusion side are motor deficits expected from an internal carotid artery occlusion.
What are the functions of carotid artery?The carotid arteries are major blood vessels that provide your brain's blood supply. You have two carotid arteries, one on either side of your neck. Carotid artery disease causes up to one-third of all strokes. A stroke occurs when something blocks blood flow to your brain, causing brain injury.
There are four carotid arteries, with a pair located on each side of the neck. This includes the right- and left-internal carotid arteries, and the right- and left-external carotid arteries.
Carotid endarterectomy, the most common treatment for severe carotid artery disease. After making an incision along the front of your neck, the surgeon opens the affected carotid artery and removes the plaques.
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The smaller the dna fragment, the __________ distance it will travel, putting closer to the _________.
The smaller the DNA fragment, the farther it will travel, putting it closer to the bottom of the gel.
In general , in the process of gel electrophoresis, the DNA fragments will get separated on the basis of their size and charge. This is the result of electric field when it is applied, the DNA fragments will migrate from the gel towards the opposite electrode.
In gel electrophoresis, the smaller fragments are moved more easily through the gel matrix, it will also decrease resistance, and migrate farther with the larger fragments. So , the smaller DNA fragments will travel more farther down the gel and get closer towards the bottom of the gel, on the other hand the larger fragments will remain at the top of the gel.
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______ psychology is especially interested the biological and environmental factors in how people change as they age
Developmental psychology is especially interested the biological and environmental factors in how people change as they age.
The scientific study of how individuals change and evolve throughout their lives, from birth to old age, is known as developmental psychology. One of the primary aims of developmental psychology is to comprehend the biological and environmental processes that contribute to these changes.
Biological influences include heredity, brain development, and hormone changes, all of which can influence a person's growth. Environmental influences include familial ties, culture, education, and social contacts, all of which can have an impact on a person's growth.
Developmental psychologists study how these elements interact and impact one another through time, and how they might result in the vast diversity of human behaviours, emotions, and cognitive capacities seen across the lifetime. Developmental psychologists examine these processes in order to uncover patterns of development and to create theories and interventions that can assist promote healthy development and well-being.
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what are the back leg muscles
A trio of muscles collectively known as the hamstrings run from the hip to just below the knee along the back of the leg.
Any one of the three muscles at the back of the thigh that are located between the hip and the knee is referred to as the hamstring. Injury is possible to the hamstrings. The one significant tendon behind the knee or a location akin is known as the hamstring in quadrupeds.
The three posterior thigh muscles extend the hip, whereas all but the short head of the biceps femoris flex the knee. The three "real" hamstrings are engaged in both knee flexion and hip extension since they traverse the hip and knee joints. Hip extension does not involve the short head of the biceps femoris since it only crosses one joint. It is sometimes removed from the term "hamstring" due to its varied origin and innervation.
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which are used to keep our systems at or near their setpoints
The feedback loops whether positive or negative are used to keep the systems at or near their setpoints.
While, the feedback loops are typically divided into two categories:
1) Positive feedback loops: As one thing changes, another thing also changes, and so on.
For instance, as a substance's concentration rises, a feedback loop results in further concentration rises.
2) Negative feedback loops, where a change in one direction results in a change in the other.
For instance, an increase in a substance's concentration can result in feedback, which eventually leads the substance's concentration to drop.
Most of the systems with positive feedback loops are by simply nature unstable. The Positive feedback loops can sometimes result in runaway conditions because a change in an input prompts responses that keep changing in the same direction. When a variable is present, the term "positive feedback" is often employed.
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What is another name for aortic semilunar valve?
The aortic or aortic valve cusps are other names for the aortic semilunar valve.
Between the left ventricle and the aorta, it's one of the 4 valves in the human coronary heart.
3 semilunar cusps, which make up the aortic valve, open and near so one can let blood from the left ventricle flow into the aorta and forestall blood from the aorta from flowing again into the left ventricle.
The aortic valve is a crucial part of the circulatory gadget and is essential for preserving everyday blood strain and glide at some stage in the body.
It controls how a whole lot of blood is pumped from the coronary heart with every contraction and is liable to a number of ailments, along with aortic stenosis and regurgitation, which could result in reduced cardiac output and heart failure.
Therefore, the aortic semilunar valve is a crucial part of the cardiovascular device of humans, and maintaining appropriate health and nicely-being relies upon it functioning nicely.
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Which type of membrane transport is directly affected by cardiac glycosides?
A. Simple diffusion
B. Facilitated diffusion
C. Primary active transport
D. Secondary active transport
Option c is Correct. The form of membrane transport that cardiac glycosides directly influence is primary active transport.
The flow of glucose in the proximal convoluted tubule serves as an illustration of secondary active transport. Energy for primary active transport is obtained directly from the destruction of ATP. The energy used in secondary active transport is secondarily acquired from energy that has been stored as ionic concentration differences on opposite sides of a membrane.
Primary Active Transport: Examples of primary active transport are the sodium-potassium pump, the calcium pump in the muscles, and the proton pump in the stomach. Glucose-sodium pump is a secondary active transport system.
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which process provides the main force driving water within xylem vessels?
Water in the xylem travels toward the top primarily due to evaporation due to the tension produced by transpiration pull.
Water in the plant's xylem is forced upward by the tension produced by transpiration, much like how tugging on a straw causes water to rise.
Cohesion leads to more water molecules filling up the available space in the xylem as the uppermost water is drawn toward the stomata. The water eventually leaves the plant through the stomata and enters the atmosphere as vapor.
On the surfaces of leaves, stomata are tiny, completely contained pores. In general, transpiration involves the absorption of water by the roots, the movement of water through plant tissues, and the exhalation of vapor by leaves.
Evaporation is the primary mechanism by which water in the xylem flows at the top because transpiration pulls the water and plants evaporate water.
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what is the difference between voluntary and involuntary control of muscles?
voluntary muscle control is conscious control of skeletal muscles, while involuntary muscle control is the automatic regulation of smooth muscles, cardiac muscles, and glands.
The human body has two types of muscle control: voluntary and involuntary. Voluntary muscle control refers to the ability to consciously control the movement of skeletal muscles, which are attached to the bones and responsible for locomotion and other bodily movements. Involuntary muscle control, on the other hand, refers to the automatic or reflexive control of smooth muscles, cardiac muscles, and glands.
Voluntary control of muscles is initiated by the central nervous system, which sends signals from the brain to the muscles through the motor neurons. This type of muscle control is under conscious control, meaning that the individual can decide when and how to move their muscles. Examples of voluntary muscle control include walking, talking, and typing on a keyboard.
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the hair cell of the cochlea is depolarized when the stereocilia are bent. (True or False)
Answer: True
Explanation:
The postero-superior surface of the heart is called the ___. base
The postero-superior surface of the heart is the back side of the heart that is closest to the spine.
It is divided into three sections: the left atrium, the right atrium, and the interatrial septum. The base of the heart refers to the area where these three sections meet, and is an important landmark for surgeons and other medical professionals. The base of the heart is where the coronary arteries, the major veins that supply the heart with blood, enter the organ. It is also the area that is closest to the pericardium, the sac-like structure that surrounds the heart and helps protect it.
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how does the concept of descent with modification explain both the unity and diversity of life
The concept of descent with modification, also known as evolution by natural selection, explains both the unity and diversity of life.
According to this concept, natural selection has caused all living creatures to alter through time as a result of their shared progenitor.
As all living things have a common progenitor and have developed from the same source, this process explains the oneness of life. Natural selection permits the survival of various features and species in various situations, resulting in increased variation, and it also explains the diversity of life.
There is a greater diversity of species and ecosystems as a result of the creatures that survive throughout time being those that are most adapted to the environment they are in.
Derivation with modification, which is how all species have developed over time, therefore explains both the unity and variety of life.
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slender extensions of the plasma membrane that increase its surface area is called___
slender extensions of the plasma membrane that increase its surface area is called microvilli .
Cells that are involved in absorption or secretion, such as those lining the small intestine and kidney tubules, have microvilli on their surfaces. They expand the plasma membrane's surface area, enabling chemicals to be absorbed or secreted more effectively. Actin filaments make up microvilli, which are sustained by a protein network immediately below the plasma membrane. Compared to cilia and flagella, two other cellular extensions involved in movement and sensory processes, they are generally shorter. The apical surfaces of polarised epithelial cells include microvilli, which increase the surface area of the cell exposed to the lumen to improve absorption and secretion.
Thousands of densely packed microvilli protrude from each tiny intestinal epithelial cell into the gut lumen.
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When studying with a friend for a test, what key points about osmosis would you make sure you tell them? Check all that apply.
Osmosis refers to the movement of water along a concentration gradient
In osmosis, water moves to equalize solute concentrations on either side of the membrane
If osmosis occurs across a membrane, then diffusion is not occurring
The movement of water across a membrane can affect the turgor pressure of some cell
Answer:
diffussion
Explanation:
movement of materials across thecell membrane
is when you give your friends list on your bike you have to pedal harder and faster to keep the same speed acceleration as you had when you’re on your bike alone is for a second or third law
Are enzymes always proteins?
Answer:
An enzyme is a biological catalyst and is almost always a protein. It speeds up the rate of a specific chemical reaction in the cell. The enzyme is not destroyed during the reaction and is used over and over
Explanation:
Axial Region
Bones from Region
Location of Axial Region
Skull
Vertebral Column
Sacrum
Rib Cage
Answer:
The axial region is the central part of the human body, and it includes the bones of the skull, vertebral column, sacrum, and rib cage. The skull is made up of the cranium and facial bones, which form the main part of the head. The vertebral column runs from the base of the skull to the base of the spine, and it is composed of 33 individual vertebrae. The sacrum is the triangular-shaped bone located at the base of the spine, and the rib cage is made up of 24 ribs. These bones together form the axial region of the human body.
The opposite of this reaction is pupillary which is accomplished when the muscles contracts
Miosis is the opposite of mydriasis, which causes your eyes' black centres to enlarge dramatically. The size of the pupils is normally equal.
They narrow in reaction to direct illumination (direct response) and the opposite eye's illumination (consensual response). Darkness causes the pupil to enlarge. The pupil is constricted by the pupillary light reflex in reaction to light, and this is done by innervating the iris sphincter muscle. Myosis, also known as miosis, is the severe constriction of the pupil (from the Ancient Greek v (mein) "to close the eyes").
Mydriasis, the opposite ailment, causes the pupil to enlarge. In the body, dilatation and constriction are opposing but connected processes. Whereas constriction results in a decrease in material flow by blocking the route, dilatation increases material flow by opening or extending a structure or passageway.
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in erythropoiesis, what is the name of the cell that has ejected its nucleus and other organelles prior to being released into the bloodstream?
The cellular that has expelled its cell nucleus before entering the circulation is known as a reticulocyte.
Reticulocytes are a sign of what?The quantity of young red blood cells (reticulocytes) throughout you extracellular environment is counted during a reticulocyte count. Reticulocyte counts are used by doctors to determine how much red blood cell production is occurring in your bone marrow. This examination is one of several available to identify and track ailments that have an impact on our red blood cells.
Does iron deficient anemia have a high reticulocyte count?The indicators of reticulocyte immaturity are greater when iron shortage is present, showing a lack of the building blocks needed to make hemoglobin. As a result, they may be used as early indicators of vitamin deficiency and anemia.
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what can you do to regain the activity of the enzyme?
To restore enzyme activity, new enzyme must be introduced. An enzymatic reaction is taking place when the pH and temperature are ideal.
What are the enzymes?Enzymes are essential for several activities, including digestion and liver function. Having too much or too little of a certain enzyme might cause health problems. The chemical reactions, or metabolism, of our bodies are sped up by proteins known as enzymes. Although certain chemicals are broken down, others are generated. Everything that is alive contains enzymes. Naturally, enzymes are produced by our bodies. Yet, enzymes are present in both food and manufactured commodities.
What are functions of enzymes?They are essential for breathing, food digestion, muscle and nerve functioning, among countless other processes. Each cell in the human body has a variety of enzymes. Enzymes can help the internal chemical processes of each cell. Digestive enzymes are necessary to break down the food you eat. These proteins speed up the chemical reactions that change food into substances your digestive system can absorb. Your saliva contains enzymes for digestion. A few of your organs, including the liver, gallbladder, and pancreas, also expel these.
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In which location is dense fog most prevalent?
a. along valley floors flanked by hilly forests
b. in coastal margins near the Great Lakes and Appalachian Mountains
c. on mountains peaks where cool air rises and condenses
d. in the middle of large, flat continental margins
b. in coastal margins near the Great Lakes and Appalachian Mountains. Fog that reduces vision to 0.25 miles or less is referred to as heavy fog.
In the Midwest, dense fog is most common between midnight and mid-morning from October through March. A frequent phenomenon in the Midwest is fog. When the soil is damp from prior rainfall, valley fog develops. The sun's energy leaves the earth when the sky clears, allowing the temperature to drop to or near the dew point. This type of dense deep fog is occasionally referred to as tule fog. Hilltops are less prone to radiation fog than valleys are. When warm rain falls into a cool layer of surface air, advection fog frequently results.
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Fill The Blank! erwin chargaff determined that the number of _____ like guanine and adenine always equal the number of ____ like cytosine and thymine.
Erwin chargaff is always determined by the number of cytosine with the guanine and adenine that is equal the number of thymine like cytosine and thymine.
Adenine, thymine, cytosine, and guanine are the four nitrogenous bases that may be found in DNA. Adenine and thymine always bond together, while cytosine always binds to guanine. As certain bases are always found in pairs, they will make up an equal proportion of the DNA.
DNA always includes equal quantities of guanine and cytosine as well as adenine and thymine, according to Chargaff's analysis of the four distinct base molecule proportions in the late 1940s. According to Chargaff's criteria, the amounts of guanine and cytosine should be equal in any species' or organism's DNA, and the amounts of adenine and thymine should be identical as well.
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