Answer:
Helper T-Cells are CD4 Cells.
Explanation:
Helper T Cells have a protein called CD4 that associates with the T-Cell receptor complex (or TCR).
How many breeds of elephant are there?
Answer:
3
Explanation:
Answer:
There are 3 different species or breeds of elephants.
Explanation:
They are:
- The African Savanna aka Bush Elephants
- The Asian Elephants
- The African Forest Elephants
I hope it helps! Have a great day!
Anygays-
A biologist was in a forest when he came across a family of squirrels hiding nuts for
the winter. The biologist was interested in this behavior, so he stayed and watched the
squirrels for a few hours. He recorded what he observed in a notebook. Which of the
following explains why this type of research is NOT considered an experiment?
O The biologist did not observe the squirrels for long enough to collect data.
The biologist did not collect valid data on the different species of squirrels present.
O The biologist observed the squirrels and did not test variables.
O The biologist came across the squirrels by chance and had no formal plan.
Answer:
biologist observed the squirrels and did not test variables
which natural resource is mined to, produce a digital phone? pls help me
How does the length of shadow on the sun stick differ at noon and in the late afternoon? Why?
A. The shadow is longer at noon because the sun is at an angle.
B. The shadow is longer in the late afternoon because the sun is at an angle.
C. The shadow is longer at noon because the sun is directly overhead.
D. The shadow is longer in the late afternoon because the sun is directly overhead.
Answer:
The answer is C hope this helps
The length of the shadow on the sun stick differs at noon and in the late afternoon, the shadow is longer in the late afternoon because the sun is at an angle.
What do you mean by Shadow?Shadow may be defined as the dark figure thrown upon a surface by a body blocking the rays from a source of light.
When the sun is at an angle usually in the early morning or late afternoon, the shadow of any object is found to be larger as compared to its original shape.
Therefore, the length of the shadow on the sun stick differs at noon and in the late afternoon, the shadow is longer in the late afternoon because the sun is at an angle.
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The central cavity of a blood vessel is called the.
Answer:
The central cavity of a blood vessel is called the: Lumen.
Explanation:
please consider as brainlest
Of the four animals (human,cat,whale,bat) which would you argue are the most closely related on the evolutionary tree?Justify your answer
Answer:
I think humans and whales are closely related on the evolutionary tree because they are both mammals and both have endoskeleton
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Question 1 of 17 Pag
Question 1
Different substances have different properties that can be used to identify them. There are three test tubes X, Y, and Z filled with gas.
Can the properties of the gas in each test tube be used to tell whether the gases are the same or different?
What do you think might happen when a gas is exposed to a small flame? List as many possible results as you can think of
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The properties of the gas in each test tube can be used to tell whether the gases are the same or different, because depending on the substance, chemical reactions will occur.
What do you think might happen when a gas is exposed to a small flame?This happens in the flame test, which is based on the fact that when a certain amount of energy is supplied to a certain chemical element (in the case of a flame, energy in the form of heat), some electrons in the last valence shell absorb this energy.
Moving to a higher energy level, producing what we call an excited state. When one of these excited electrons returns to the ground state, it releases the energy previously received in the form of radiation.
With this information, we can conclude that the properties of the gas in each test tube can be used to know if the gases are the same or different, because depending on the substance, chemical reactions will occur.
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Which of these is a major difference between skeletal muscle and cardiac muscle? A.Skeletal muscle works very quickly; cardiac muscle works very slowly. B.Skeletal muscle does not fatigue ; cardiac muscle is fatigues quickly. C.Skeletal muscle is involuntary ; cardiac muscle is voluntary. D.Skeletal muscle is fatigues. muscle does not.
D.Skeletal muscle is fatigues. muscle does not.
Skeletal muscle is striated muscle-essentially the fibers slide on each other to shorten and lengthen.
Cardiac muscle is a bit of a mish-mash. It is quite contractile and has striations like skeletal muscle, but also has discs within the structure which speed the contractile process
Skeletal muscle is voluntary and will not contract unless stimulated by a nerve fiber (or an electrode). Cardiac muscle is involuntary and contracts even without nervous stimulation.
Answer:
D.Skeletal muscle gets fatigued while the cardiac muscle does not.
Explanation:
Cardiac Muscle Skeletal Muscle
Length
Shorter Longer
Controlled by
Autonomic nervous Somatic nervous
system system
The key difference between skeletal muscle and cardiac muscle is that skeletal muscle is under voluntary control while cardiac muscle is under involuntary control. Muscle tissue is one of the four types of tissues present in the animal body.Which animal trait was Darwin's theory of natural selection based on? (1 point)
O swimming ability of Galápagos iguanas
O beak morphology of Galápagos finches
O predatory behavior of foxes
o coloration of peppered moths
Answer:
beak morphology of Galápagos finches
Answer:
Beak Morphology.
Explanation:
His theory was based off of the finches from different areas and their ability to pick up food. The beak shape was based off of the diet of the bird. For example, if a finch had a diet consisting of seeds, it had a dense, powerful beak that was able to crush the seed.
Please help with this question I have
Which of the following is true?
O Rivers account for most of the earth's surface water
O Earth's water = 60% Ocean and 40% Freshwater
O Glaciers and Icecaps account for most of the freshwater on earth
O Most of the earth's freshwater is groundwater like rivers and lake
Answer:
C. Glaciers and Icecaps account for most of the freshwater on earth
Explanation:
Glaciers and icecaps make about 68.7% of the freshwater we have here on earth.
I hope it helps! Have a great day!
Sandra~
Answer:
C.
Explanation:
Glaciers and icecaps make about 68.7% of the freshwater we have here on earth, so that would make the answer C.
I hope it helps! Have a great day!
bren~
Please help. This in an crossword puzzle.
what can help climate change the least?
A) A carbon tax
B)Economic growth
C) Increased energy effciency
D) Technological growth
Answer:
Economic growth
Explanation:
It would help the planet plants animals and people
What does dna have that determines all my traits
Answer:
These sections of DNA that contain information that determine your physical features are called genes. Since you have two pairs of chromosomes, you also have two pairs of genes, one from your father and one from your mother. These pairs of genes then determine certain physical features or traits.
Explanation:
A scientist is trying to decide whether an organism is Prokaryotic/Eukaryotic. Which information would help make the decision?
Answer:
8
Explanation:
9
Which part of the plant contains the most chlorophyll?.
Answer:
The palisade layer
The palisade layer contains the most chloroplasts as it's far close to the pinnacle of the leaf. The chloroplasts comprise the pigment chlorophyll. The palisade cells are organized upright.
In a sensory pathway, which neuron detects the stimulus and transmits the signal to the spinal cord or brainstem
Answer:
Afferent neurons.
Explanation:
because in the dorsal roots carry impulses from the body's sensory receptors to the spinal cord where the information begins to be processed and because The ventral horns contain efferent motor neurons which control the body's periphery.
Which level of taxonomy is the largest and most inclusive? Group of answer choices phylum Domain species order
Answer:
Domain
Explanation:
The order of classification is like this (from biggest to smallest):
Domain -> Kingdom -> Phylum -> Class -> Order -> Family -> Genus -> Species
Hope this helped!
If you do more work in less time you have displayed more __
PE
Work
Joules
Power
Answer:
Power or #4
Explanation:
If you do more work in less time you have displayed more Power.
:)
Which region of the human alimentary tract has both the largest population of bacteria and the greatest species diversity
The region of the human alimentary tract that has both the largest population of bacteria and the greatest species diversity is the the colon.
The normal flora of the alimentary tractNormal flora are those microorganisms that resides in a living organism without causing it harm or diseases.
These normal flora become established in different parts of the body from birth such that the normal flora found in the mouth is not the same as the one found in the colon of the alimentary tract.
From research works, the large intestine (colon) is known to contain 100 billion per milliliter of fluid culture.
The massive numbers of bacteria in the large intestine (colon) creates a great special variation in the flora. The streptococci and lactobacilli found in the colon often adhere to cells by means of capsules surrounding the bacteria.
Therefore, the region of the human alimentary tract that has both the largest population of bacteria and the greatest species diversity is the the colon.
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‘A’ is formed by the interdependence between two organisms ‘B ‘and ‘C’ for mutual benefit. This relationship is also referred to as ‘D’. ‘A’ is also a pollution indicator. Identify A, B, C and D.
Which factors affect the type of cloud that will be formed? select three choices. altitude temperature color of clouds size of ice pellets whether water condenses as liquid or ice
Answer:
To conclude, many factors affect cloud formation, including topography, air temperature, and humidity.
Explanation:
The factors affect the type of cloud that will be formed are temperature , color of clouds and water condenses as liquid or ice.
These factors affect the formation of clouds as cloud formation will have the all factors like humidity, water, temp, and also sometimes light.
What is altitude?It is the height of mountains or any plains, pleautue, and several other earth mountains, valley and sometimes also of the himalyan mountains.
Thus it is well explained.
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Why are common areas difficult to conserve
Answer:
The production and consumption of natural resources is necessary for society to function
Explanation:
Elisabeth is an oceanographer. On which of the following research expeditions would she travel from the photic zone to the aphotic zone?
A.) A snorkel trip from the intertidal zone to 55 feet off the beach
B.) A scuba trip from the surface down 100 feet
C.) A submersible traveling from the ocean surface to the abyss
D.) A research vessel from the beach to the open ocean
A research expedition traveling from the photic zone to the aphotic zone, is a submersible traveling from the surface of the ocean to the abyss.
What is aphotic zone and photic zone?Depending on the lighting, the waters are divided into:
PHOTIC ZONE → up to 200 m deep. DYSPHOTIC ZONE → between 200 m and 400 m deep. APHOTOTIC ZONE → below 400 m depth.With this information, we can conclude that a research expedition traveling from the photic zone to the aphotic zone, is a submersible traveling from the surface of the ocean to the abyss.
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Answer:
A submersible traveling from the ocean surface to the abyss
Explanation:
Which type of fiber helps a person feel full, therefore possibly causing weight loss?
Answer:
soluble fiber
Explanation:
soluble fiber draws water into your gut, which softens your stools and supports regular bowel movements. it not only helps you feel fuller and reduces constipation but may also lower your cholesterol and blood sugar level.
In evolution, which driving factor most consistently requires a small population as a precondition for its occurrence?.
Answer:
Genetic drift Natural
Explanation:
In evolution, which driving factor most consistently requires a small population as a precondition for its occurrence? Genetic drift Natural In evolution, which driving factor most consistently requires a small population as a precondition for its occurrence? Genetic drift Natural selection Nonrandom mating Mutation.
In evolution, Genetic drift is the driving factor which most consistently requires a small population as a precondition for its occurrence.
What is Genetic Drift?A change in the relative frequency of alleles within a population is an example of genetic drift. Natural selection, often known as the differential survival and reproduction of individuals across a population as a result of differences in phenotype, is one of the possible causes of this phenomenon.
Natural selection gives an advantage to some characteristics in a population, which results in certain individuals being able to reproduce while others, who have characteristics that give them a disadvantage, will provide their genes to subsequent generations. This will ensure that the allelic frequency of each successive generation will be distinct from that of the parent group.
Therefore, a subpopulation may become genetically diverse from its parent population due to genetic drift.
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which abolitionist's life was most at risk? Explain
Answer:
PEOPLE KNOWN FOR: abolitionism. William Lloyd Garrison, American journalistic crusader who published a newspaper, The Liberator (1831–65), and helped lead the successful abolitionist campaign against slavery in the United States.
Explanation:
For white Southerners, Brown was the worst possible nightmare: a fearless, committed abolitionist, armed, accompanied by blacks, and willing to die to end slavery. Indeed, in the minds of Southerners, Brown was the greatest threat to slavery the South had ever witnessed.
URGENT PLEASE HELP, WORTH 100 POINTS!!
1.What happens as the number of niches in an ecosystem goes up?:
1- biodiversity decreases
2- biodiversity increases
3- endangered species goes up
4- ecosystem stability goes down
2.What group of organisms has the greatest number of species?:
1- animals
2- insects
3- plants
4- protists
3.Why do coral reefs have such a high biodiversity?:
1- they have many different niches
2- they are found in northern latitudes
3- they are found in deep, warm waters
4- they have an unusually uniform habitat
Explanation:
1.What happens as the number of niches in an ecosystem goes up?:
Biodiversity increases- As the number of niches increases, I suppose there would be more competition for space
2.What group of organisms has the greatest number of species?
insects-In terms of numbers of species, insects certainly represent the largest percentage of the world's organisms. There are more than 1 million species of insects that have been documented and studied by scientists.
3.Why do coral reefs have such a high biodiversity?
they have many different niches-High biodiversity ensures the health of the reef. It spreads those roles across many species, so if one species is affected by a disease or other threat, that role won't be lost on the reef.
osmotic potential definition
Answer:
osmotic potential (OP value) a measure of the tendency of a solution to withdraw water from pure water by OSMOSIS across a differentially permeable membrane. Pure water has an osmotic potential of zero at one-atmosphere pressure
Explanation.
Genes determine the of organisms. why do you guys give a whole essay for a dang answers but thx anyways