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Natalija [7]
4 years ago
13

Please help me

Biology
1 answer:
SIZIF [17.4K]4 years ago
4 0

Answer:

The correct answer is b cystic fibrosis .

Explanation:

Cystic fibrosis is a genetic disorder.It occur due to mutation in a protein called cystic fibrosis trans membrane conductance regulator or simply CFTR.

   CFTR is a integral membrane protein that helps in the transport of chloride ions(Cl-).

   The production of sweat ,mucus occur due to the proper functioning of CFTR.If CFTR become nonfunctional due to mutation the secretion becomes thick and this thick secretion accumulate in lungs to cause respiratory tract infection.

 Beside lungs cystic fibrosis also affect other organs such as pancreas,kidney etc.

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1. Which of the following statements regarding enzymes is TRUE?
andreev551 [17]

Answer:

D. All of the above

Explanation:

Enzymes are proteins, act as biological catalysts, and are sensitive to factors like pH and temperature.

Hope this helps!

6 0
3 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
SOMEONE PLEASE TAKE THE TIME TO GIVE ME THE ANSWERS TO THESE QUESTIONS PLS
bazaltina [42]
I will help later I'll ask my professer......
6 0
3 years ago
Students observe woodchucks in their area. In the summer, students observe that woodchucks eat a lot of plants. In the winter,
andriy [413]

Answer:

The correct answer is - B. Woodchucks hibernate to survive the winter.

Explanation:

Many mammals such as groundhog or also known as woodchucks hibernate during winter in order to survive winter. Hibernation is the process or state of minimal activity during a particular time of the year characterized by low body temperature, slow heart rate, and low metabolic rate.

Woodchucks are become less active and remain in their burrow and seen very little during the winter and stay like this till late winter or early spring.

4 0
3 years ago
Can someone help me with these
prisoha [69]
The answer is B. hope you get it

8 0
3 years ago
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