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Mnenie [13.5K]
3 years ago
6

Oxygen gas (O2) is produced by plants and algae. What is the source

Biology
1 answer:
Andrei [34K]3 years ago
6 0
The answer is C. Carbon Dioxide and also A) water

Plants and algae use carbon dioxide and water in presence of sunlight to perfrom photosynthesis. Oxygen is a by-product of this process and is used later by the plant for respiration.
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Suppose you traveled back in time and located the first animals to have evolved feathers. You found that these animals were tree
Nana76 [90]

Answer:

Feathers initially evolved in a role associated with sexual selection.

Explanation:

In species where only males had feathers, these feathers can be considered to have evolved into a role associated with sexual selection. This is because in these species, males used their feathers as a sexual attraction for females, in this case, females chose the males that had more attractive feathers to mate and generate new individuals for the species. An example of this can be seen in the peacock, where the tail with lush feathers is only present in males and is intended to sexually attract females.

6 0
3 years ago
1/5
IgorC [24]

Answer:

↓

Explanation:

I can't really read what you have typed, but the subscripts are the little numbers such as this 2 in H₂O. So using the blue pen, I'm assuming you would circle the little numbers. The coefficients are the numbers in front of the elements so from what I can read, in 2HCl the 2 would be circled in the orange. So in a simple way the subscripts are the tiny numbers that are at the bottom (usually after elements), and the coefficients are normal numbers in front of the whole element.

Hopefully that makes sense! :)

7 0
2 years ago
The main difference between the four nucleotides that make up DNA is that they have ?
marissa [1.9K]

The nucleotides in DNA contain four different bases, those of which being nitrogenous bases.

The four bases are:

1 - Thymine

2 - Cytosine

3 - Adenine

4 - Guanine

Hope this helps you. Do mark me as brainliest.

6 0
3 years ago
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How does passing through clay beds affect groundwater?
Paladinen [302]

Answer:

Passing through clay beds filters groundwater, purifying out soil,  or organic materials, and contaminants to leave behind pure water that fills up aquifers.

Explanation:

I hope this help you .

5 0
3 years ago
Some elephants in the scrub jungles of Africa had long trunks with which to reach out for leaves. They were able to reproduce mo
Whitepunk [10]
"Survival of the fittest" is the one among the following choices given in the question which is an aspect of Darwin's theory that is shown as an example in this scenario. The correct option among all the options that are given in the question is the third option or option "c". I hope that this answer has helped you.
4 0
3 years ago
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