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Scilla [17]
4 years ago
14

Scientists have hypothesized that oxygen began to build up in the Earth's atmosphere after the development of living things with

the ability to A. breathe air. B. form tissues. C. photosynthesize. D. reproduce sexually.
Biology
2 answers:
kirza4 [7]4 years ago
8 0
C. photosynthesize

I hope this helps:)
Kruka [31]4 years ago
7 0

Answer:

The answer is c. photosynthesize

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<span> myxoamoeba or swarmers </span>
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Most cells cannot harness heat to perform work because
Daniel [21]

Answer:

Temperature is usually uniform throughout a cell (Ans. C)

Explanation:

Heat or thermal energy is a kinetic energy. That is connected with the random movements present in the atoms. Temperature is usually uniform throughout the cell so the most cell can not harness heat to perform work.

Heat is a type of energy which is transfer from one body to another body due to the temperature difference.

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How many chromosomes do humans have?
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3 years ago
what feature did terrestrial plants acquire in order to adapt to life on land to transport materials throughout their bodies
Brut [27]

Answer:

they developed some structures or parts to survive

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8 0
3 years ago
How does the cardiovascular system deliver nutrients and oxygen to all cells in the body via the flow of blood? Select all corre
Alex

Answer:

1: (The arteries carry blood away from the heart; the veins carry it back to the heart.)

2: (In the systemic circulation, the left ventricle pumps oxygen-rich blood into the aorta.)

4: (Blood, which is low in oxygen, is collected in veins and travels to the right atrium and into the right ventricle.)

Explanation:

The blood circulatory system (cardiovascular system) delivers nutrients and oxygen to all cells in the body. It consists of the heart and the blood vessels running through the entire body. ... In the systemic circulation, the left ventricle pumps oxygen-rich blood into the main artery (aorta).

The arteries carry blood away from the heart; the veins carry it back to the heart. ... The blood travels from the main artery to larger and smaller arteries and into the capillary network. There the blood drops off oxygen, nutrients and other important substances and picks up carbon dioxide and waste products.

The inferior and superior vena cava bring oxygen-poor blood from the body into the right atrium. The pulmonary artery channels oxygen-poor blood from the right ventricle into the lungs, where oxygen enters the bloodstream. The pulmonary veins bring oxygen-rich blood to the left atrium.

-A Helping Friend

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3 years ago
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