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Rom4ik [11]
3 years ago
12

11. Memory T cells _____. (Select all that apply.) A. must all be activated in secondary lymphoid organs B. do not require co-st

imulation through CD28 C. are composed only of CD4 T cells D. do not undergo somatic hypermutation E. are usually short-lived F. do not undergo isotype switching.
Biology
1 answer:
cluponka [151]3 years ago
6 0

Answer: Activated by the binding of an antigen to a specific matching receptor on its surface, a B cell proliferates into a clone.

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Which factors tend to promote higher biodiversity in an ecosystem? Check all that apply.
aleksandrvk [35]

Answer: diversity of niches

, large area and warm climate

Explanation:

An ecosystem is a biotic community in which the living beings interact with their non-living physical environment. The following factors which are responsible for higher biodiversity in an ecosystem:

Diversity of niches: A niche can be define as the functional role an organism performs in an ecosystem so as to sustain it's life. For example the type of habitat, food and breeding season chosen by the organism. With the increase in the differences in the diversity of niches the organism exhibit variations and differences from the members of the same species or from the members of the other species.

Large area: The large area can support the reproduction and abundance of members which belongs to different species hence will help in promoting higher biodiversity in a region.

Warm climate: The warm climatic range will offer the chances of adaptations to the living organisms to sustain their lives in harsh environmental conditions. This will lead to evolution of  new species from the parent species.

5 0
4 years ago
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A meter stick or meter tape is used to measure the length, width, or height of an object. A meter stick is most often divided an
Ludmilka [50]

Answer:

a centimeters

Explanation:

I think this is right. has both centimeters and millimeters but centimeters are labeled

7 0
3 years ago
Which best describes what happens to stop during photosynthesis​
sertanlavr [38]

Answer:

it dosent stop

Explanation:

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4 0
3 years ago
WILL GIVE BRAINLIEST!!!
max2010maxim [7]

The shown lipid is a saturated triglyceride.

A type of lipid is known as a triglyceride which is an ester derived from glycerol combined with three fatty acid molecules.

8 0
3 years ago
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Cole is making a pedigree chart for the dogs that he breeds. His chart will have shaded shapes to show dogs who carry the domina
nadya68 [22]
You could do this: do the same shape but one shaded and one not
To show that female expressed that trait
Hope this helps you

3 0
4 years ago
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