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sweet-ann [11.9K]
2 years ago
12

How do superantigens cause polyclonal activation of CD4T cells but yet those T cells are inefficient in eliminating infection Un

derstand the outcomes of primary immune deficiencies including SCID, defects in B cell production, DiGeorge Syndrome and chronic granulomatous disease.

Biology
1 answer:
xxMikexx [17]2 years ago
8 0

Answer:

Please see attachment

Explanation:

Please see attachment

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Some slime molds have some morphological similarities to fungi such as during times of stress they will develop into fruiting bo
gayaneshka [121]

Answer:

The correct answer will be option - D.

Explanation:

Slime moulds are the fungus-like protists which bear a structure called sporangium which produces spores.  The sporangium is produced in fungi as well due to which these protists are called fungus-like.  Although both produce sporangium but they are not closely related, rather they are distantly related organisms.

The appearance of a sporangium in both indicates that they had faced the same conditions due to which they both showed the same adaptation by producing the same structures performing the same function. In evolutionary terms, this is an example of convergent evolution.

Thus, option D is the correct answer.

5 0
3 years ago
A gene for corn has two alleles, one for yellow kernels and one for white kernels. Cross pollination of yellow corn and white co
Rina8888 [55]

The question is incomplete. The complete question is:

Question: A gene for corn has two alleles, one for yellow kernels and one for white kernels. Cross pollination of yellow corn and white corn results in ears of corn that have an approximately even mix of yellow and white kernels. Which term best describes the relationship between the two alleles?

a) Incomplete dominance

b) Genetic recombination

c) Chimerism

d) Codominance

Answer:

d) codominance

Explanation:

Codominance is a pattern of inheritance when none of the alleles of a gene is able to mask the expression of the other allele of the same gene. When the two alleles are present together in a heterozygous genotype, both are expressed and the phenotype of the heterozygote is different from both the pure breeding parents. In the given example, cross-pollination of yellow corn and white corn results in the ears of corn that have an approximately even mix of yellow and white kernels. This means that the heterozygote expresses both the allele for the corn color. Therefore, it represents codominance.

3 0
3 years ago
What are invasive species?
yaroslaw [1]

A. Nonnative species that are superior competitors

8 0
2 years ago
Read 2 more answers
The odds of a couple's first baby being a boy or girl are 50%. Let's say they have a girl, then they have another girl, then ano
Vadim26 [7]

I am pretty sure that it's still 50% :)

6 0
3 years ago
How can pesticide use be harmful to human agriculture?
iogann1982 [59]
The Answer is (A) 
Because the pesticide will kill off the bugs and weeds but will damage the soil so after the crops you have in the ground now just will not grow there again until 1 year after the pesticide has washed away
hope I helped
4 0
3 years ago
Read 2 more answers
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