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Kitty [74]
3 years ago
7

What evidence BEST supports the presence of atmospheric oxygen 2.7 billion years ago?

Biology
1 answer:
Serhud [2]3 years ago
7 0

Answer:c

Explanation:layered iron rust in rocks

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Gre4nikov [31]
I believe heterotrophs are organisms that get their energy by eating other organisms. These organisms are also called predators
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Question 2 (5 points) .<br> Which is an example of the aesthetic value of a healthy ecosystem
Klio2033 [76]

Answer:

<em>A beautiful waterfall</em>

Explanation:

Aesthetic value can be described as the value of an object or event, whether occurring naturally or being constructed. It can be described as the virtue of an object and its worth. The aesthetic value determines how much of an object or event is pleasing to the eyes or how much it can be displeasing.

A beautiful waterfall for sure increases and enhances the value of a healthy ecosystem. It is a sight which offers pleasure to the eyes and soul.

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Sugar is a component of which of the following? carbohydrates lipids nucleic acids
Ksenya-84 [330]

Answer;

-Carbohydrates

Sugar is a component of carbohydrates.

Explanation;

-Carbohydrates are among the four important biomolecules, others being nucleic acids, proteins and lipids.

-Sugars are simple carbohydrates including fructose, glucose, and lactose, which are found in nutritious whole fruits.

-Carbohydrates take the form of either sugars or starches (complex carbohydrates); however, a starch is simply a long chain of sugar molecules strung together, therefore, they both end up as the same thing once they enter your blood stream.

6 0
4 years ago
Read 2 more answers
What word is used to describe the normal, or target, value for something?
oksian1 [2.3K]
The set point is the normal, or target, value for something.
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3 years ago
A scientist is designing an investigation to study the impact of invasive bird populations on local, native bird populations at
Fudgin [204]

Answer:

Amount of food is independent variable

Explanation:

As food increases the population increase and population is the dependent variable. hope this helps :)

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