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arlik [135]
3 years ago
15

What are red blood cells and what do they do?

Biology
2 answers:
Anvisha [2.4K]3 years ago
6 0

Explanation: In your blood you have different kinds of cells. You have some cells that are called red blood cells that carry oxygen to your body and they can carry carbon dioxide back to your lungs so that's what your blood red cells are.

Verdich [7]3 years ago
4 0
Hemoglobin is the protein inside red blood cells that carries oxygen. Red blood cells also remove carbon dioxide from your body, transporting it to the lungs for you to exhale. Red blood cells are made inside your bones, in the bone marrow. They typically live for about 120 days, and then they die.
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15,000 years ago, when humans were foragers and hunters, what characterized daily life? What were humans eating, and where and h
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1. 15,000 years ago the humans were still hunter-gatherers. Their daily lives were largely based around one thing, finding enough food to survive through  the next few days. This means that they had to constantly be on the move, be it for hunting animals, or for finding rich places with eatable plants. There was lot of walking, running, and scouting involved every day. It was a lifestyle of ''living through the day''.

2. During this period of time, the diet of the humans was consisted of animals they hunted, fish, and plants. There were differences from region to region though, so the people that lived along the coastline based their diet on marine animals, the ones that were living in colder regions were eating mostly meat, while the ones living in forested areas or grasslands had combination of plants and meat. The lifestyle in general was moving from place to place, be it on a daily basis, weakly, or seasonally, depending on the conditions. Some of these people were making small shelters, some of which were retractable and they were moving them with them, while others were using caves.

3. There are many difference between the forager peoples and the agriculturalists. The foragers were nomads, thus they were moving very often from one place to another, while the agriculturalists were having a settled lifestyle. The nomads very often had bad injuries which were often fatal, usually because of hunting, while the agriculturalists had much better health because they had much safer lifestyle. The foragers were not able to produce their own food, but instead they were relying on mother nature, while the agriculturalists were producing their own food and had the food problem solved.

4 0
3 years ago
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A marine biologist measures the density of oyster larvae, in number of larvae per liter of seawater, at four different sites in
Ugo [173]

Answer: stationary

Explanation:

6 0
3 years ago
Adult giraffes eat about 75 pounds of food in a day. On average, an area can provide 450 pounds of food per day for giraffes. Ba
densk [106]

Answer:

6 giraffes

Explanation:

If an area can provide 450 pounds of food for the giraffes and the giraffes eat 75 pounds of food per day, you can divide:

450 by 75= 6

6 giraffes is the capacity for that area

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3 years ago
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sveta [45]
Some stimuli act as attention-getting stimuli due to their physical characteristics; others, due to their meaningfulness, act as attention-holding stimuli.
For example, somebody's physical appearance, of a person who is attractive, is used as an attention-getting stimuli, but their psychological qualities are what hold your attention due to their meaningfulness. 
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3 years ago
What might the colonists have harvested in 1621?
Ugo [173]
They have harvested potato's carrots, and more for it was thanksgiving.
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3 years ago
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