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SVETLANKA909090 [29]
2 years ago
5

How much more CO2 is in the atmosphere today compared to 150 years ago?

Biology
2 answers:
olga2289 [7]2 years ago
6 0

Answer:

Humans have burned so much fuel that there is about 30% more carbon dioxide in the air today than there was about 150 years ago

Explanation:

ludmilkaskok [199]2 years ago
3 0

Answer:

Carbon dioxide is a greenhouse gas and traps heat in the atmosphere. Without it and other greenhouse gases, Earth would be a frozen world. But humans have burned so much fuel that there is about 30% more carbon dioxide in the air today than there was about 150 years ago, and Earth is becoming a warmer place.

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Cancer cells multiply rapidly and normal cells don't.
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Mutations that neither benefit nor harm the organism have _________ effect on the organism's survival.
Deffense [45]
The answer is D. A neutral
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Woese a. was involved in determining rRNA sequences AND proposed breaking eukaryotes into domains Archaea and Bacteria. b. propo
katrin2010 [14]

Answer:

Option (e).

Explanation:

Karl Woese was an biophysicist and microbiologist. He was known as the originator of rRNA sequences in 1967.

Karl determines the 16rRNA sequence by the technique pioneered by Woese. He breaks the prokaryotes into two groups and discovered the third domain of life.

Thus, the correct answer is option (e).

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3 years ago
Why do you need to study Biochemistry in the Health science field?
makkiz [27]

Answer:

Biochemistry is integrated into the Health science field.

Explanation:

For Health Science, you are dealing with the human body. To solve issues in the human body, you need to understand how it works. This would include both biology and chemistry. Biochemistry just so happens to be a combination of both,and is sometimes called biological chemistry. It is the study of chemical processes within and relating to living organisms, and is usually taken by students who aren't taking Organic Chemistry. Health science has a lot of work in helping athletes train and get back into the game after injuries. If you go along with this example, then you'll understand where biochemistry comes into play. In order to help the athlete heal, you have to be able to understand how your muscles, bones, or even immune system work on a microscopic level. Chemistry comes into play if you have to consider how medications they might be taking may be affecting them, or how their hormones are coming into play.

4 0
3 years ago
The advantage of a closed circulatory system over an open circulatory system is that
Ber [7]
Hello friend!!

Circulation-<span>is the movement of substances such as nutrients and gases within blood vessels and cavities throughout the body.

</span>

Not all animals have a circulatory system.                                                      Poriferans, cnidarians, platyhelminthes and nematodes (nematodes have pseudocoelom fluid but no vessels) are avascular animals. Echinoderms do not have true circulatory systems either.

In animals that do not contain a circulatory system, the transport of substances occurs by cell to cell diffusion.

Blood is a fundamental means of substance transport for larger animals since, in these animals, tissues are distant from each other and from the environment thus making diffusion impossible.

Circulatory systems can be classified into open circulatory systems and closed circulatory systems.

An open circulatory system is one in which blood does not circulate only inside blood vessels but also flows into cavities that irrigate tissues. In open circulatory systems, blood pressure is low and generally the blood (called hemolymph) has a low level of cellularity.

Arthropods, molluscs (cephalopods are exception) and protochordates have open circulatory systems.


A closed circulatory system is one in which blood circulates only inside blood vessels. For this reason, the blood pressure is higher in animals with closed circulatory systems. The cellularity of the blood is also higher, with many specific blood cells.

Closed circulatory systems are a feature of annelids, cephalopod molluscs and vertebrates

A closed circulatory system is more efficient. Since blood circulates only inside blood vessels, it has a higher pressure and, as a result, can travel greater distances to the organs where hematosis happens and to peripheral tissues. In addition, the higher circulatory speed increases the animal’s capacity to distribute large supplies of oxygen to tissues that consume it in large amounts, such as muscle tissues, which can then perform faster movements. Animals with an open circulatory system (with the exception of insects, which carry out gas exchange separately from circulation) are generally slower and have a low metabolic rate.


<span>In insects, the circulatory system is open but this system does not participate in the gas exchange process or in oxygen supply to tissues. Gases enter and exit through the independent tracheal system, which allows for the direct contact of cells with the ambient air. Therefore, an insect can supply the large oxygen demand of its fast-beating wing muscles even though it has an open circulatory system.</span>

<span>
</span>

<span>Hope It helps!!</span>

<span>All the Best!!</span>

7 0
3 years ago
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