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VARVARA [1.3K]
3 years ago
5

What would happen if guard cells in a plant stopped working?

Biology
2 answers:
Bumek [7]3 years ago
3 0
The correct option is C

<span>C.Stomata would not open and close.
</span>
This is because guard cells play an important function of controlling stomata. the ensures that stomata are open during the day and closed during the night for the purposes of photosynthesis. The stomata are the pores that are found on the under surface of a plant leave,whose role is gaseous exchange.
<span />
Stels [109]3 years ago
3 0

Answer: <u>C. Stomata would not open and close.</u>

Explanation: The main function of guard cells is to regulate the opening and closing of the pore formed between the gap of two guard cells, termed as stomata. Option A is incorrect as stomata are the least susceptible area from where pathogens can enter the plant cell. Option B is incorrect because photosynthesis is not directly and much affected by guard cells. Option D is incorrect as chloroplasts are not associated with the guard cells. Stomata are directly linked with movement of guard cells, so correct answer is option C. Through stomata, exchange of gases and water vapor takes place.


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If mitosis stopped in your body, what effects would you see most rapidly? Which tissues would
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Cell division during mitosis is necessary for replacing damaged or dying cells, as well as repairing damaged or worn-out cells that occur naturally. The main mechanism behind growth is this kind of cell division.

<h3>What are the consequences if mitosis stopped in the body?</h3>

Without mitosis, there wouldn't be any cell division or growth. The fact that genetic information cannot be passed on is most essential. All cell processes would be significantly impacted.

You might also suffer serious consequences, as your heart would have to beat by itself, among other things. Your bones or your brain wouldn't be immediately impacted, but your blood cells would.

Therefore, Every cell in your body would stop replicating itself if mitosis halted, which would induce a heart attack.

Learn more about mitosis here:

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5 0
1 year ago
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1.a
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Which of the following is NOT true of plants?
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Answer:

D

Explanation:

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Which human activity pollutes lakes and rivers?
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C

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Two genes determining a trait In primroses, the dominant allele of gene K is necessary to synthesize blue flower pigment. Blue p
viktelen [127]

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

8 0
3 years ago
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