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Sphinxa [80]
3 years ago
8

For about how many years of geological time have humans existed on Earth?

Biology
1 answer:
VMariaS [17]3 years ago
6 0
I think that it is 4.5 million years. It does not end there though because other people would just say it and go. The reason we know this is because there is some people who lose teeth in those areas when mankind started then they took it to a lab and they found their results after continuous testing.

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What are some functions of protein
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Proteins also have structural or mechanical functions, such as actin and myosin in muscle and the proteins in the cytoskeleton<span>, which form a system of scaffolding that maintains cell shape. Other proteins are important in cell signaling, immune responses, </span>cell adhesion<span>, and the cell cycle. hope that helped</span>
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What is the IV ? Independent Variable
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Answer:

The variable that does not rely on another variable. IVs can include time, weather, etc.

Explanation:

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Explain why decompress are an important part of a food chain
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the correct word is decomposers*

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3 years ago
A scientist is observing onion cells and human cheek cells under a microscope. Which observation does she most likely make?
saw5 [17]

The main difference between a plant cell and the animal cell is the presence of cell wall.

In the plant cell, the cell wall is present, but in the animal cell, the cell wall is absent.

Hence, in the onion cells, the cell wall around the cell would be clearly visible, whereas in the case of cheek cell, the cell would only be lined by a cell membrane, a cell wall would not be present.

Further, the plant cell would have the chloroplast, as they perform photosynthesis, but the animal cell would not have chloroplast. Unlike animal cell, the central vacuole in the plant cell is bigger and clearly visible.

8 0
3 years ago
Read 2 more answers
HELP PLEASE!!! ASAP I NEED QUICKLY!! DBA List the helpful interactions. List the harmful interactions.
Svetach [21]

1. Symbiosis is the interaction between two different living organisms living together to survive.

2. Parasitism is the relationship between two species of plants or animals in which one benefits at the expense of the other, sometimes without killing the host organism.

Example: Tapeworms attach themselves to the insides of the intestines of animals.They get food by eating the host's partly digested food, depriving the host of nutrients. Another example is fleas. they harm their hosts, by biting their skin, sucking their blood, and causing them to itch.

3. A predator is an animal that preys on other animals, usually for food.

Example: A lion or a bear.

4. The definition of prey is where one organism, the predator, kills and eats another organism.

Example: The prey to a lion would be a zebra, and the prey to a bear would be a fish.

5. Mutualism is where two different species live together to survive at each others advantage.

Example: Oxpeckers and rhinos.

6. Commensalism is where one organism benefits and the other is not harmed or benefited.

Example: Barnacles and Whales.

7. Predation helps keep herbivores from growing into too large of crowds, and predation keep the population of animals in general in check.

8. Competition both within and between species is an important topic in ecology, especially community ecology.

9. This is in your own words :)

10. I don't know what article you read

<em>I hope this all helps :D</em>



3 0
3 years ago
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