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Lady_Fox [76]
3 years ago
8

How did Earth's atmosphere become oxygen-rich?

Biology
1 answer:
eduard3 years ago
4 0

Answer:

The answer is tiny organisms known as cyanobacteria, or blue-green algae. These microbes conduct photosynthesis: using sunshine, water and carbon dioxide to produce carbohydrates and, yes, oxygen. ... "What it looks like is that oxygen was first produced somewhere around 2.7 billion to 2.8 billon years ago.

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To the base pair given write the correct matching base pair for
adelina 88 [10]

AT, GC

Explanation:

Adenine (A) pairs with Thymine (T).

Guanine (G) pairs with Cytosine (C).

A - T

C - G

T - A

T - A

G - C

C - G

hope this helps you!

5 0
2 years ago
The diagram below shows the structure of a protein. what is the structure labeled A
nydimaria [60]

Answer:

B. An amino acid

Explanation:

Have a great day/night! :3

8 0
3 years ago
How much would a person who weighs 200 pounds on earth weigh on the moon? answer.com?
tekilochka [14]
That person would weigh 33.07 pounds on the moon
8 0
3 years ago
Bacteria in your intestines are an example of mutualism if they
Fofino [41]

Answer: if they help you break down food

Explanation:

Mutualism is a biological relationship between TWO or more organisms of different species (inter-specie) in which one or more benefits.

A good example is bacteria in the human intestine that helps to break down cellulose contained in food, thus benefitting humans.

3 0
3 years ago
Explain how body cells (somatic) and sex cells (gametes) are made up from chromosomes?
lana [24]

゚+*:ꔫ:*﹤  ﹥*:ꔫ:*+゚Answer:゚+*:ꔫ:*﹤  ﹥*:ꔫ:*+゚

Somatic cells are produced through the cell division process of mitosis. ... Cells with two copies of each chromosome are called diploid. Sperm and egg cells, called gametes, are formed through meiosis, which is a slightly different cell division process that results in the cells having only one copy of each chromosome.

゚+*:ꔫ:*﹤  ﹥*:ꔫ:*+゚Explanation:゚+*:ꔫ:*﹤  ﹥*:ꔫ:*+゚

Human body cells (somatic cells) have 46 chromosomes. A somatic cell contains two matched sets of chromosomes, a configuration known as diploid. ... Human cells that contain one set of 23 chromosomes are called gametes, or sex cells; these eggs and sperm are designated n, or haploid.

゚+*:ꔫ:*﹤  ﹥*:ꔫ:*+゚゚+*:ꔫ:*﹤  ﹥*:ꔫ:*+゚゚+*:ꔫ:*﹤  ﹥*:ꔫ:*+゚゚+

8 0
3 years ago
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