Is oxygen or a reactant or a product in photosynthesis and celluar respiration?

Answers

Answer 1

Answer: In photosynthesis it is a product. With respiration it is a reactant.

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Hormones are chemical secreted and regulate by the endocrine system. TRUE or FALSE.

Crossing over is the largest contributor to genetic variation in sexually reproducing organisms. true or false

Answers

:) The answer is True.

It is true if you looked in your books

What are 4 words that describe chlorophyll

Answers

Green, pigment, Photosynthesis, Chloroplasts

Are a group of cells that work together to perform a specific function.A)organs

B) tissues

C)organ systems

D)organisms

Answers

Answer:

B tissues

A tissue is a group of cells, in close proximity, organized to perform one or more specific functions.

How does energy acquisition in the deep sea differ from energy acquisition near the ocean’s surface?

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I think the correct answer from the choices listed above is option C. The energy acquisition in the deep sea differ from energy acquisition near the ocean’s surface by the fact that organisms in the deep sea do not have direct access to sunlight. hope this helps!!!

What is variation among members of different species called?

Answers

Answer:

I think inter-specific variation.

Explanation:

Different phenotype? I think

What is the structure formed by wrapping of DNA around the histone core?

Answers

The structure formed by wrapping DNA around a histone core is called a nucleosome.

What is a nucleosome?

A section of DNA wrapped around core histoneproteins is termed a nucleosome. The protein and DNA complex inside the nucleus is called chromatin. This is a thread-like structure due to the formation of which DNA is condensed into a small volume.

The structure of chromatin appears to be like 'beads on a string under a microscope. The beads are the nucleosomes. The nucleosomes are small structures with a diameter of approximately 11 nm. Also, nucleosomes are known to be the fundamental subunits of chromatin.

In each nucleosome, a set of eight histone proteins are present. There are about two turns of DNA in each nucleosome around eight histone proteins. These histone proteins are known as histoneoctamer. There are two sets of each histone protein namely, H2A, H2B, H3, and H4.

Therefore, the structure formed by wrapping DNA around a histone core is called a nucleosome.