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galina1969 [7]
3 years ago
6

Unlike b cells, t cells do not display antigen receptors on their surface membranes

Biology
2 answers:
Mkey [24]3 years ago
8 0
The statement is true
PilotLPTM [1.2K]3 years ago
7 0

Explanation:

the wind blow his head down the street changeinto voice

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Which one of the following characteristics of Archaea enables them to survive in extreme environments?
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1. How do populations of organism's influence each other? Give an example.
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beacuse when people number growth too much it can have impact by economic and etc and many people are hunting animals for food and for other thing so we have to balance it

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Punnett squares can be used to predict the two possible outcomes of the botanist’s test cross. The Punnett square on the left sh
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3 years ago
In the plaque assay for bacteriophages, A. only temperate phages may be used. B. the plaque is an opaque area caused by a high c
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The correct answer is C. In the plaque assay for bacteriophages, the plaque is a clear zone caused by a zone of lysis.

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The plaque assay is an approach used for titering bacteriophage stocks or determining the quantity of infectious virus in a sample. Plaques are visualized if you spot the phage on a lawn of growing compatible bacteria. Each plaque indicates an initial infection with one phage followed by lysis of neighboring bacteria in the lawn. Only viruses that cause visible damage of cells can be assayed in this way. The plaque assay is used to determine viral titer as plaque-forming units per ml so that known amounts of virus can be used to infect cells during subsequent work.

In the plaque assay for bacteriophages, the plaque is a clear zone caused by a zone of lysis.

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Which of the following statements describes the central dogma of molecular biology?
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Q2. The answer is D. 46. In a human diploid somatic cell (2n), there are 23 chromosomes present in two copies - 22 pairs of autosomes and 1 pair of sex chromosomes. So, in a normal human karyotype there will be in total 46 chromosomes (23 pairs in 2 copies: 23 × 2 = 46).
   
Q3. The answer is A. inbreeding. Inbreeding is a breed from closely related organisms. Inbreeding causes a decrease of genetic variation by increasing homozygosity. This way, it can cause the genetic defect by bringing two recessive alleles together.</span>
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