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3 years ago

The first cells activated by the antigens are called ?

Biology

1 answer:

juin [17]3 years ago

8 0

Answer:

Effector B- cells.

Explanation:

These are also known as plasma B cells- and are pretty much the cells that secrete antibodies against the antigen in question. They also, through a cascade of events, produce activated T-cells (T-helper and T-cytotoxic cells). The latter cells organize cell-mediated immune response against the antigen.

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Which is the best hypothesis for the scientific question How does light intensity affect the rate of photosynthes 57

LuckyWell [14K]

Explanation:

A hypothesis mustn't be too detailed since you are about to take the experiment and not sure of the outcome so we have to stick with Light intensity has an impact on the rate of photosynthesis.

Hope it helps.

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3 years ago

An organism has a haploid number of 36. What is the organism's diploid number?

Anuta_ua [19.1K]

Answer:

72, because you just multiply by 2

5 0

3 years ago

Read 2 more answers

Theodor W. Engelmann illuminated a filament of algae with light that passed through a prism, thus exposing different segments of

WARRIOR [948]

Answer:

The correct answer is C and Engelmann conducted this experiment to prove relationship between algae and the rate of photosynthesis.

Explanation: First we must talk about 3 facts:

1) Prism scatters the white light into different wavelengths.

2) Photosynthesis, 6 carbon dioxide and 6 water molecules are consumed and 6 oxygen and 1 sugar molecule is synthesized using light energy.

6CO2 + 6H2O → C6H12O6 + 6O2

3) Aerobic bacteria breaks down sugar while using oxygen and produces water and carbon dioxide in simplified terms.

So with this experimental setup a researcher can understand the rate of the photosynthesis by increased accumulation of aerobic bacteria near algae in certain wavelengths since they uses oxygen and tend to move close to the oxygen source (see figure). In this experiment there are no ways to measure heat (B), there is no known relation between wavelength of light and aerobic respiration since it can happen even in the dark (A) and finally there are no ways to measure carbon dioxide (D).

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3 years ago

Reflections 1-c 2-d 3-d 4-c 5-a

Mazyrski [523]

Answer:

1-C............. ...............

5 0

3 years ago

What is the expected phenotypic ratio of the offspring of a a BbPp*BbPp cross if these alleles sort independently?

nadezda [96]

Answer:

Let's consider that the allele 'B' is for Black hair colour and it is dominant. Let's consider that the allele for red hair colour is b.

Let's consider the allele for lacking horns or polles is 'P' and it is dominant. The allele for having horns is 'p' and it is recessive.

When two heterozygous black, lacking horns (BbPp) are crossed, the results will have the probability of 9 black/polled : 3 black/horned : 3 red/polled : 1 red/horned organisms.

8 0

3 years ago