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Vlad1618 [11]
2 years ago
5

Which of the following is true of vertebrates with four-chambered hearts?

Biology
1 answer:
ludmilkaskok [199]2 years ago
7 0

Answer:

There is no mixing of oxygen-rich and oxygen-poor blood.

- -

The right atrium and right ventricle of the human heart pump oxygen-poor blood to the lungs and the left atrium receives oxygen-rich blood. They never mix.

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A chemical substance that organisms require to live is what
horrorfan [7]

Answer:

Nutrients.

Explanation:

Nutrients are the chemical substances required by any organism to meet the basic requirements of life. The nutrient can be either organic or inorganic, but both are important for the organism.

5 0
2 years ago
Which region of the human alimentary tract has both the largest population of bacteria and the greatest species diversity
n200080 [17]

The region of the human alimentary tract that has both the largest population of bacteria and the greatest species diversity is the the colon.

<h3>The normal flora of the alimentary tract</h3>

Normal flora are those microorganisms that resides in a living organism without causing it harm or diseases.

These normal flora become established in different parts of the body from birth such that the normal flora found in the mouth is not the same as the one found in the colon of the alimentary tract.

From research works, the large intestine (colon) is known to contain 100 billion per milliliter of fluid culture.

The massive numbers of bacteria in the large intestine (colon) creates a great special variation in the flora. The streptococci and lactobacilli found in the colon often adhere to cells by means of capsules surrounding the bacteria.

Therefore, the region of the human alimentary tract that has both the largest population of bacteria and the greatest species diversity is the the colon.

Learn more about normal flora here:

brainly.com/question/10641594?source=archive

4 0
1 year ago
Help will mark brainliest
laila [671]

Answer:

your arteries that are connected to your lungs are also connected to your heart and then you need to be in the vena cava which are connected to your heart as well so you need the veins

5 0
3 years ago
Whih type of blood cell does sickle cell anaemia affect?​
almond37 [142]

Answer:

Red blood cells

Explanation:

Hemoglobin carries oxygen in red blood cells

3 0
2 years ago
Read 2 more answers
PLEASE HELP?!! WILL MARK BRAINLY
saw5 [17]

Answer:

You just posted his one? Credit to: Vermont Legislative Research Shop

Explanation:

If you need extra resources: Lawn and garden chemicals, such as fertilizers enter the groundwater in two ways. In the first method, the chemicals can enter the groundwater by rainwater into a stream as runoff. This is especially problematic in urban environments where hard-surfaced roads allow rainwater to move over them without benefit of soil acting as a filter (Rosen and White, 1999). The water in streams replenishes groundwater, so the chemicals are absorbed into the groundwater as well. The second method of contamination is through leaching, which is the downward movement of a substance through the soil. The fertilizer may also dissolve into the surface water, which recharges the groundwater (Virginia Cooperative Extension, 1996).  Nitrate is highly soluble and readily leaches into groundwater. Water with over 10 parts per million nitrate-nitrogen can cause methemoglobinemia, an inability to use oxygen in infants. The nutrient phosphorus harms clear, free water by creating algal blooms. This process, known as eutrophication, turns the water green, clouds the water, causes odor problems, and depletes the oxygen for fish and other species, effectively suffocating them (Lake Champlain Basin, 1998).  To ensure that the groundwater does not get so contaminated as to be unhealthy, in 1986 the Department of Food and Markets implemented the Pesticide Monitoring Program. The goal of this program is to test wells in agricultural areas to help farmers learn about practices that prevent pesticides from leaching into the groundwater, and to conserve the nutrients in fertilizers and manure in the soil. This program is funded by fees taken from companies that sell pesticides and fertilizers in Vermont (Vermont Department of Agriculture, Food and Markets, 1998).

7 0
2 years ago
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