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sineoko [7]
3 years ago
5

6. When humans first appear on Earth?

Biology
1 answer:
vaieri [72.5K]3 years ago
6 0

Answer:

seven million years ago

Explanation:

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denis-greek [22]

Answer: C & D

Explanation: I talked about this in my science club. They said C and D was the best answers.

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3 years ago
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Who was the author of the book Principles of Geology? The book presented arguments to support a theory of geological change, pro
zmey [24]

Answer:

The correct answer is "Charles Lyell".

Explanation:

Charles Lyell was a notorious Scottish geologist that associated events of Earth's history with natural events taking place at the same time. In 1830, Charles Lyell published the book "Principles of Geology", associating the formation of the Earth's crust with different small and vast natural events. Charles Darwin's was largely influenced by Lyell's ideas and he took his book during the famous travel trough the Galapagos islands.

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3 years ago
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critically evaluate the role of a persons rights and responsibilities when executing freedom of expression during verbal interpe
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A person does have basic human rights and one is the freedom of expression. Though this is the case, we should understand that our right to freely express ourselves (from political to religious views), it does not necessarily give us the right to impede another person’s. A play with words can easily hurt or even harass other people, and in return may be a form of human right violation. 

3 0
3 years ago
Answer ASAP 50 points
Mnenie [13.5K]

Answer/Explanation:

In humans, we breathe in oxygen via the respiratory system. The oxygen enters the lungs. The air sacs in the lungs - the alveoli - are the site of gas exchange in the lungs and are where the circulatory and respiratory systems interact.

The alveoli take in the oxygen, where it diffuses into the capillaries (circulatory system). Blood, which passes through the capillaries takes this oxygen to all the cells in the body. Oxygen binds to haemoglobin in red blood cells, which transport it around the body.

Additionally, blood also transports carbon dioxide back to the alveoli of the lungs, where it diffuses into the lungs and is expelled when we breathe out

3 0
3 years ago
Which two body systems interact to expel the waste product carbon dioxide
Pani-rosa [81]

Answer:

excretory system  and circulatory system

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Blood is  part of circulatory system and as it move through various organs it exchanges the gases i.e give oxygen to the cell and take carbon dioxide from them. After taking CO2, the  blood becomes impure and hence it passes through the kidney before going to the heart. Kidney is part of excretory system which removes carbon dioxide from blood and thus purifies it.  

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