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Hunter-Best [27]
3 years ago
12

Cytotoxic T cells can attack target cells with which of these chemical weapons?

Biology
1 answer:
GenaCL600 [577]3 years ago
4 0

Answer:

secrete a cytokine that triggers apoptosis

Explanation:

Cytotoxic T cells secrete granzymes and perforins when targeting cells. Additionally they secrete cytokines such as IFN-, TNF-α and TNF-β that act to activate macrophages and help kill infected cells.

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What are transparent worms that prey on other plankton?
TiliK225 [7]
<span><span>Chaetognaths worms </span>are the transparent worms that prey on the other plankton.
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5 0
3 years ago
A bee pollinates flowers social hierarchy social hierarchy territorial imperative territorial imperative competition competition
Ivanshal [37]

Answer:

cooperation

Explanation:

Cooperation occurs when living things of different species work together to benefit themselves. The interaction between a bee and a flower is a symbiotic relationship. A symbiotic relationship between two living things is one in which at least one of the parties benefits. The relationship between the bee and the flower is a mutual one because both parties benefit.

While the pollen and nectar serve as food for the bees, the spread of the pollen to other plants assist in the reproduction process.

5 0
3 years ago
Is the function of an endocrine system to move muscles or deliver oxygen or break nutrients?
Pani-rosa [81]

The endocrine system is made of glands that secrete hormones. These hormones help regulate the organs and cells activity. The hormones among other things control your metabolism.

5 0
3 years ago
A 21-year-old college student presents for her first annual exam. She has been sexually active for 1 year and has had two partne
mojhsa [17]

Answer:

<h2>Diseases transmitted through sexual contact are sexually transmitted diseases. Individuals having more than one sexual partners and doing unprotected sex are more prone to sexually transmitted diseases.</h2>

Explanation:

Individuals having more than one sexual partners and doing unprotected sex are more prone to sexually transmitted diseases. Here, the college student has more than one partner and not always use the condoms. So, she is prone to have sexually transmitted diseases if her partner are infected. Presence of warts indicates that she might have infected with Human Papillomavirus (HPV). HPV is a sexually transmitted infection (STI).

5 0
3 years ago
3. In one population, 18 individuals have long hair and 182 individuals have short hair. It is known thatmating has been random
pishuonlain [190]

Answer: p (short hair) = 0.91 and q (long hair) = 0.09

Explanation: In the population, short hair is a feature of domnant allele, because there are more short haired individuals than with long hair. In genetics, p is the frequency for dominant allele and q is for recessive allele.

For this question, short hair is allele L and long hair is allele l

So, the frequency of short hair is p and of long hair is q.

To calculate the frequencies:

Frequency of allele L = (number of copies of allele L in population) / (total number of L/l gene copies in population)

p = 182/200 = 0.91

The same formula goes for the recessive allele, so:

q = 18/200 = 0.09

Thus, the frequencies of hair allele are 0.91 and 0.09 for short and long, respectively.

8 0
3 years ago
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