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Alexxx [7]
3 years ago
5

Many plant cells have more than two complete sets of chromosomes in each cell. Explain how this might occur.

Biology
1 answer:
otez555 [7]3 years ago
7 0
Polyploidy (more than two complete sets of chromosomes) is not rare among plants. For example, pollen grains may reach female flowers via animals or wind. In some cases, pollen grains from species with 4 complete sets of chromosomes will have 2 sets of chromosomes. Pollen grains may fuse with a female reproductive organ with 1 set of chromosome (so, female plant must have 2 sets of chromosomes). The resulting zygote will have 2 + 1 sets of chromosomes, so the plant will have 3 complete sets of chromosomes.
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Carbon can be found in shells and
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B IS THE ANSWER

Explanation:

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Which of the following statements about nuclear energy is true?
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D

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What are domains in biology? Question 8 options: internet website classification system highest ranking of organisms in taxonomy
lora16 [44]

Domain is the highest ranking of organisms in taxonomy.

The correct option is b.

<h3>What do you mean by domain?</h3>

Domain is the highest ranking of the biological system.

In the system there are three domains

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This is the highest classification, after this further classification of living organism is done.

Thus, the correct option is B

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7 0
1 year ago
Assume that the left ventricle of a child's heart has an EDV=90mL, and ESV=60mL, and a cardiac output of 2,400 mL/min. His SV is
Sliva [168]

Answer:

SV = 30 ml/ beat.

HR = 80.

Explanation:

The formula to calculate SV is as follows:

SV = EDV- ESV.

Here EDV = 90ml (end diastolic volume), ESV = 60ml (end systolic volume) ans SV is stroke volume.

SV = 90-60

SV = 30ml/beat.

The formula to calculate HR is as follows:

HR = CO/SV

Here, HR is heart rate, CO is cardiac output = 2,400 ml/min and SV is stroke volume = 30ml/beat

HR = 2,400/30

HR = 80.

Thus, the SV is 30ml/best and HR is 80.

4 0
2 years ago
Some snail species' shells can have right-handed direction of shell coiling or left-handed direction of shell coiling. The direc
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The cross between Dd egg-snail and a dd s snail mate will result in snails with genotype 1/2 Dd:1/2 dd and phenotype all right-coiling.

<h3>What is a genotype?</h3>

The genotype refers to the allele combinations that can be found for one or more loci in an individual.

The phenotype refers to how the genes and alleles interact to produce a physical trait in an organism.

In this case, one parent can produce two types of gametes (D and d), whereas the other parent can only produce d gametes.

Learn more about genotypes here:

brainly.com/question/22117

4 0
2 years ago
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