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timama [110]
3 years ago
10

HELP?????????????? ????

Biology
1 answer:
Murljashka [212]3 years ago
4 0
THE ANSWER IS C (sorry for caps)
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A plant that has two identical alleles at the same gene locus is said to be ______.
DerKrebs [107]
A is the correct answer
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3 years ago
Which biome has the least precipitation?
Korvikt [17]

Answer: Option C.

Tundra

Explanation:

Tundra is a biome that has low Precipitation. Precipitation is a form of water that fall from the atmosphere to the Earth surface. Which could be inform of snow, sleet e.t.c.

Tundra is the coldest of all types of biomes. It has low temperature, little precipitation,low nutrients. It is located near the north Pole of the Earth. It is characterized by permafrost, permanent frozen layer on its surface.

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3 years ago
How fertilization occur in flowering plant​
Ghella [55]
Answer: For flowering plants, fertilization occurs through a process known as double fertilization. Unlike most plants, double fertilization enables the new seed to grow into a new plant and have a food source to begin growing. Double fertilization occurs within the female part of a plant, the pistol.

explanation: When pollen is formed by the anther, or male part of a plant, it will blow in the wind or attach to an organism that carries it to the top of the pistol, known as the stigma. Once the pollen attaches to the stigma, the pollen germinates and forms a pollen tube that extends into the ovary. Once formed, two sperm cells will be released and fertilize both the egg and the two polar nuclei of the plant to form the zygote and endosperm, respectfully.
7 0
2 years ago
The blood Group of Mother is O. The Blood Group of the Child is B. Man Exonerated If He to Blood Group?​
aalyn [17]

Answer:

If the mother's blood type is O, and the child's blood type is B, a man would be exonerated from paternity if he has blood type A or O.

Explanation:

In the above case, if a mother has blood type O and her child has blood type B, a man can be exonerated from paternity only if his blood type is A or O, and responsible if he is type B or AB.

The blood type is defined by the presence of surface antigens in the red blood cell, called A and B. The presence of each antigen is determined by a gene present on the parental chromosomes.

  • <em> </em><u><em>Blood type A</em></u><em> corresponds to the presence of gene A, and its genotypic expression can be A/A or A/O. </em>
  • <u><em>Type B blood</em></u><em>, whose genotype is B/B or B/O, is due to the presence of a gene containing the B antigen. </em>
  • <u><em>AB blood</em></u><em> —due to codominance— has one gene for A and another for B, with genotype A/B. </em>
  • <em>Blood type O, characterised by the absence of surface antigens, behaves like a recessive trait, which only manifests itself in the absence of surface antigens A and B. The genotype is O/O. </em>

By making a hypothetical crossing between mother and man, one can observe why he can be exonerated.

<u>Man with blood type O </u>

♂ O|O

♀ O|O

Alleles     O      O

O           O|O   O|O

O           O|O   O|O

The only possibility, in this case, is to have children with type O blood. No chance of children B.

<u>Male with blood type A </u>

♂ A|O

♀ O|O

Alleles     A        O

O            A|O    O|O

O            A|O    O|O

In this case there is a 50% chance that the children will be blood type A and 50% chance that they will be O. No chance of children B.

In the case of a man A|A the result is 100% probability of children A|O, and no probability of children B.

<em>So, a </em><em>man with blood types A (any genotype) and O, can be exonerated from paternity</em><em>, since it is </em><em>impossible for him to have a child of blood type B, when the mother is of blood type O</em>.

4 0
2 years ago
What does this symbol indicate on a weather map?
Minchanka [31]

Answer:

I think its cold front

Explanation:

8 0
3 years ago
Read 2 more answers
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