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Zinaida [17]
3 years ago
13

7. Explain why we have 4 seasons.

Biology
1 answer:
Juliette [100K]3 years ago
4 0

Answer:

The four seasons happen because of the tilt of the Earth's axis. At different times of the year, the sun's rays hit different parts of the globe more directly. The angle of the Earth's axis tilts the Northern Hemisphere towards the sun during the summer.

Explanation:

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What is the relationship between structure and function of biological molecules?
Llana [10]

Biological molecules or biomolecules are the carbohydrates, proteins, lipids and nucleic acids that are produced by the living organism. A very significant relationship lies between their structure and function as they are inter relatable.

Biomolecules are designed in such a way that on forming a particular structure only their specific functions can be formed. It is to ensure that no molecules other than the desired ones bring a change. If the latter situation arises, it may refer to harm or lethality.

For instance, insulin binds to its receptor and decreases the blood glucose level. Change in its structure will lead in inability to bind to the receptor specifically designed to accomodate it. And if function is not dependent on structure, then any molecule may bind to the receptor and decrease the blood sugar level to the point that body may not be able to function.

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The electron carrier _________________________ is converted to NADPH during the light-dependent reactions.
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7 0
3 years ago
How many working egg cells are normally produced when a female in meiosis?
GenaCL600 [577]
Four egg cells are produced in meiosis but only one will actually be used.
4 0
3 years ago
Which of the following a synapomorphy linking dinosaurs and birds?
Readme [11.4K]

Answer:

d. furcula

Explanation:

Furcula

Furcula is a synapomorphy linking dinosaurs and birds .

The furcula is the structure formed by midline fusion of clavicles and this very  element is unique in the theropods as well . And is the most crucial for understanding the link between birds and the theropods .

The first suggestion was by Huxley in 1868 , and in 1870 , the key component of the debate is the presence of Frucula .

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