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Dovator [93]
2 years ago
15

Describe the role of each of these white blood cells: • T cells: • B cells:

Biology
1 answer:
OverLord2011 [107]2 years ago
4 0

Answer:

B cells are at the centre of the adaptive humoral immune system and are responsible for mediating the production of antigen-specific immunoglobulin (Ig) directed against invasive pathogens (typically known as antibodies).

Explanation:

T cells are a part of the immune system that focuses on specific foreign particles. Rather than generically attack any antigens, T cells circulate until they encounter their specific antigen. As such, T cells play a critical part in immunity to foreign substances.

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Which of the following best describes how plants obtain the materials necessary to perform photosynthesis?
Lerok [7]

Answer:The raw materials required for the process of photosynthesis are carbon dioxide, water and solar energy.

The carbon dioxide present in the atmosphere diffuses into the leaf through stomata.

Water is obtained from the plant roots.

Solar energy is obtained from the sun which gets trapped by the chlorophyll pigment present in the leaves.

Explanation:

6 0
3 years ago
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What determines what types of organisms can survive and thrive in an ecosystem?
prisoha [69]

natural selection, bc it is the process whereby organisms better adapted to their environment tend to survive and produce more offspring

4 0
2 years ago
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George Beadle concluded that teosinte is the likely ancestor of maize (corn), even though the two plants appear very different.
Oliga [24]

Answer:

Option B

Explanation:

ALL options are as follows -

a. teosinte and maize can produce fertile hybrids.

b. teosinte and maize have similar chromosomes.

c. Both Teosinte and maize have naked, soft kernel.

d. Teosinte and maize can produce fertile hybrids

Solution

Beadle started working on maize genetics since 1962 after joining graduate school at Cornell University.  

During his research he found that the chromosomes of teosinte and maize possess higher similarity and also show signs of intercross ability of the two species and hence confirmed that wild teosinte is an ancestor of domesticated maize.  

He later concluded that there are only 4 to 5 genes that make these two species different from each other rest all is similar.  

Option B is correct

3 0
3 years ago
What is the difference between an organisms habitat and its niche?
djyliett [7]

Answer:

Organism's habitat (where a species live) can be described as all of the biotic and abiotic factors in the area where an organism lives.

Ecological niche (how species live) is composed of all of the physical, chemical, and biological factors that a species needs to survive, stay healthy, and reproduce. Niche includes food, abiotic conditions, and behavior.

4 0
3 years ago
What kind of evidence would be needed in order to change any part of cell theory?
Anvisha [2.4K]

Answer:

In order to change any part of the cell theory, we will have to prove that the cells are not the basic unit of life. We will have to provide evidence that a cell does not distinguish a living thing from a non-living thing. We will either have to prove the spontaneous generation to be true or have to prove that if not cells, then what are the basic units of life. We will also need evidence to prove that a cell does not arise from a pre-existing cell.

5 0
3 years ago
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