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Nutka1998 [239]
2 years ago
14

Help pls will mark brainlist ​

Biology
2 answers:
CaHeK987 [17]2 years ago
7 0

Answer: Its independent variable

Explanation: Bernard's experiment investigated the effect of the air pressure in the footballs. He decided how much air to put in each ball. The air pressure in the footballs did not depend on what happened in the experiment. So, the air pressure in the footballs was an independent variable in this experiment.

Airida [17]2 years ago
3 0

Answer:

independent variable

Explanation:

The air pressure of the football can stand on it's own, there isn't anything affecting it. instead, the air pressure is influencing the experiment. The dependant variable I'm this experiment would be the distance traveled.

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What is a proton and what does it do ?
stealth61 [152]

Answer:

A proton is a subatomic particle with a positive charge. It is found in the atomic nucleus. ( AG Caesar) Atoms consist of smaller particles called protons, neutrons, and electrons. Here is the definition of a proton, its electric charge, where it's found in the atom, and a collection of proton facts.

hope this helps

have a good day :)

Explanation:

3 0
3 years ago
Select the correct statement about the three-chambered hearts of amphibians and nonbird reptiles. A scheme of blood circulation
Soloha48 [4]

Answer:

The three-chambered hearts of amphibians and nonbird reptiles are facultative, allowing variation in blood flow through the heart.

Explanation:

In Anatomy, cardiac cycle can be defined as a complete heartbeat of the human heart which comprises of sequential alternating contraction and relaxation of the atria and ventricles, therefore causing blood to flow unidirectionally (one direction) throughout the human body.

Generally, the cardiac cycle occurs in two (2) stages;

I. Diastole : in this stage, the ventricles is relaxed and would be filled with blood.

II. Systole: at this stage, the muscles contracts and thus, allow blood to be pushed through the atria.

All amphibians and reptiles except for crocodiles (having four-chambered heart) have three-chambered hearts, which typically comprises of a partially divided ventricle and two atria.

Hence, the correct statement about the three-chambered hearts of amphibians and nonbird reptiles is that, the three-chambered hearts of amphibians and nonbird reptiles are facultative, allowing variation in blood flow through the heart due to the partially divided ventricle.

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2 years ago
What happens during the lytic cycle of a viral infection?
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The viral uses the host cell to make new viral parts . 
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13 If 90 families were lost in an extinction event that lasted 10 million
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