Answer:
Downstream, along the river is vague and middle of town makes no sense, upstream would mean that the pollution would run right past the town and cities and could pollute the town's and cities
Question:
<em>What is Darwin’s theory of the origin of species?</em>
Answer:
<em>The theory of evolution by natural selection, first formulated in Darwin's book "On the Origin of Species" in 1859, is the process by which organisms change over time as a result of changes in heritable physical or behavioral traits.</em>
Hope this helps!
D. all of these
Explanation:
All of the provide option clearly denotes how matter are transferred between organisms.
Based on the amount of available matter the earth is conserved. Matter is only transferred and transformed as it goes between organisms and the environment.
- Plants obtain their nutrients from the soil and they use them for various life processes. Thus, matter is exchanged between the physical environment and living organisms.
- Matter is also transferred from one living organism to another. Plants are consumed animals.
- When living organism decay, their matter are released back into the physical environment.
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Conservation of matter in chemical reactions brainly.com/question/2190120
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Answer:
The correct answer would be Atria push blood into the ventricles and Ventricles push blood out of the heart.
In humans, four chambered heart is present with two atria and two ventricles.
Deoxygenated blood from all over the body is passed into the right atrium through vena cava (superior and inferior).
Simultaneously, oxygenated blood from the lungs is passed into the left atrium of the heart with the help of pulmonary vein.
Both the atria contract at the same time to drain their blood into respective ventricles.
The ventricles undergo relaxation while receiving blood.
The valves present between the atria and ventricles (tricuspid and bicuspid valve) ensures that the blood flows in one way direction only. They shut down as the ventricles contract and produce the sound "lub".
The ventricles contract simultaneously to pump blood out of the heart. The right ventricle pumps deoxygenated blood into pulmonary artery which takes the blood to the lungs for oxygenation.
The left ventricle passes the oxygenated blood through aorta to all the parts of the body.
The pulmonary and aortic valves prevent the back flow of blood and shut at the same time which creates second sound called as "dub".
Answer:
water plants soak water vapor reducing the water that falls and is calculated by how many plants you have
Explanation:
