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Anettt [7]
3 years ago
5

Why is there only one winter and summer a year​

Biology
1 answer:
iris [78.8K]3 years ago
7 0
The earth got hit by a meteor billions of years ago and now it sits on an axis
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Please help :(
faltersainse [42]
The answer is lyric cycle
8 0
3 years ago
Which of the following is a cause of a DNA mutation?
Reika [66]
DNA Mutation is caused by the alteration of single base units in DNA, or the deletion, insertion, or rearrangement of larger sections of genes or chromosomes. Thus, the correct answer is option D.

1.DNA Mutations are caused by environmental factors known as mutagens.

2.Types of DNA mutagens include radiation, chemicals, and infectious agents.

3.DNA Mutations may be spontaneous in nature.
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2 years ago
The fetal shortcut from the right atrium to the left atrium is the
Anarel [89]
The answer is called the foramen ovale. Hope this helps.
8 0
3 years ago
What is the difference between continuous and discontinuous variation?
ira [324]
Discontinuous variation <span> refer to large, conspicuous differences from the parents</span>
This is where individuals fall into a number of distinct  categories, and is based on features that cannot be measured across a complete range
continious variation refer to small, indistinct differences from the normal condition.
Milk yield in cows, for example, is determined not only by their genetic make-up but is also significantly affected by environmental factors such as pasture quality and diet, weather, and the comfort of their surroundings
6 0
3 years ago
Scientists use a dichotomous key to help them identify and classify living things. the word dichotomous means
stepladder [879]

Answer:

C

Explanation:

4 0
3 years ago
Read 2 more answers
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