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Amanda [17]
4 years ago
12

The Russian chemist Oparin suggested that for organic molecules to form on Earth, the atmosphere was probably rich in all of the

se EXCEPTA. oxygen.B. water.C. ammonia.D. methane.E. hydrogen.
Biology
1 answer:
ra1l [238]4 years ago
3 0

Answer:

A. Oxygen

Explanation:

In the primitive atmosphere, oxygen was uncommon. The most abundant chemical compounds in the atmosphere of our primitive planet Earth were ammonia, methane, and hydrogen. Those gases are substrates that favor the formation of carbon, nitrogen, and hydrogen (basic elements of life, including the oxygen in water).

Due to some phenomenons, oxygen becomes more abundant in the atmosphere and life proliferates.

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Goshia [24]

Answer: The answer is A. Increaed use of fossil fuels.

Explanation:

5 0
3 years ago
During endocytosis, the vesicle membrane fuses with a lysosome, and the membrane and its contents are broken down by __________.
Triss [41]
<span>During endocytosis, the vesicle membrane fuses with a lysosome, and the membrane and its contents are broken down by enzymes</span>
7 0
3 years ago
what are structures without a present-day function called? a. homologous c. vestigial b. analogous d. extinct
Lesechka [4]
C. Vestigial. 

A vestigial structure example in out bodies is the Appendix. We don't really need it, it just kind of "hangs out" in our bodies. We evolved to not need it. 

I hope this helped! Let me know if it did not! 
I hope you have a fantastical day!!!XD
4 0
4 years ago
You find a new organism and are trying to determine what how it eats. You found it in a mud flat at the ocean and it has no teet
olga nikolaevna [1]

Answer:

A Detritivore

Explanation:

A Detritivore is a heterotrophic organism that feeds on dead plant and animal materials. They could also feed through coprophagy which is nutrition obtained by feeding on feces. Worms that dwell on the soil, insects, and mollusks are examples of detritivores. Detritivores can also be found residing in aquatic environments. Crabs and Lobsters are examples of these organisms.

Detritivores have no teeth. So, they tend to suck in their food, and this food, through peristaltic actions, moves directly into the digestive tract where it is acted upon by digestive enzymes. From the observations, I made about the organism at the mudflat at the ocean, I can conclude that it is a detritivore.

4 0
3 years ago
The word centripetal means "center-
galina1969 [7]

Answer:

petus ‘seeking’

Explanation:

I think, I'm pretty sure. ;)

I hope this helped

4 0
3 years ago
Read 2 more answers
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