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Harrizon [31]
3 years ago
11

When b-lymphocytes are exposed to an appropriate antigen, they proliferate into plasma cells and ____________ ?

Biology
1 answer:
SIZIF [17.4K]3 years ago
4 0
It should be memory cells
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Why is it necessary for dna to replicate before mitosis begins
Alexeev081 [22]

Answer:

Mitosis is the process of cells splitting in order to duplicate and reproduce. If DNA is not completely replicated before it is split, the daughter cells won't have a complete strand of DNA there won't be enough chromosomes in your somatic (body) cells and would result in you having a disability.

Explanation:

6 0
4 years ago
Two genes determining a trait In primroses, the dominant allele of gene K is necessary to synthesize blue flower pigment. Blue p
GREYUIT [131]

Answer:

The ratio of blue to white offspring in the progeny is 4 blue : 12 white.

Explanation:

<u>Available data:</u>

  • The dominant allele K is necessary to synthesize blue flower pigment
  • K is inhibited by the dominant allele D
  • Plants with the genotype K- D- will not produce pigment (and their flowers will be white)

Cross: testcross for (Kk Dd) plants

Parental)   KkDd     x     kkdd

Gametes) KD   kD   Kd   kd      

                kd   kd   kd   kd

Punnet square)        KD        Kd       kD       kd

                      kd     KkDd   Kkdd   kkDd   kkdd

                      kd     KkDd  Kkdd   kkDd   kkdd

                      kd     KkDd   Kkdd   kkDd   kkdd

                      kd     KkDd   Kkdd   kkDd   kkdd

  • Whenever D is present, it inhibits the expression of the K gene, so every plant with the dominant D allele will be white. This plants´ genotype is kkD- or K-D-.
  • Whenever D is absent and K is present, every plant with genotype K-dd will be blue.
  • The recessive form for K and D genes will express white-flowered plants, with genotype ddkk

F1) Progeny genotype: 4/16 KkDd, white-flowered plants

                                      4/16 Kkdd, blue-flowered plants

                                      4/16 kkDd, white-flowered plants

                                      4/16 kkdd, white-flowered plants

     The ratio of blue to white offspring in the progeny is 4 blue : 12 white.

     Blue-flowered plants: 4 Kkdd

     White-flowered plants: 4 KkDd + 4 kkDd + 4 kkdd

5 0
4 years ago
Which of the following statements is most accurate?
Likurg_2 [28]
I think it’s the second option. There is a ph scale attached below to explain this. Hope it helps.

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20 POINTS, BRAINLIEST, RATING, ETC!
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Due to continuous global warming, the oceans tend to gain more heat and hence the temperature rises. In the current century, the heated conditions of the oceans can be threatful for the human population. Also, the increase in the sea levels will have serious consequences on the health of mankind and their quality of life.

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C -Chemosynthesis and decomposition
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