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Juliette [100K]
3 years ago
15

The major role of the respiratory system is to __________.

Biology
1 answer:
fgiga [73]3 years ago
4 0
Provide organs and muscles with the oxygen they need to function
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Which of the following occurs when oxygen transfer from the blood to the body's cells and tissues?
Snowcat [4.5K]

Answer:

B. External respiration

Explanation:

Respiration means transport of oxygen to the cells within tissues, and the transport of carbon dioxide in the opposite direction.

5 0
3 years ago
Read 2 more answers
A forest has two groups of plants that appear to be very similar both phenotypically and genotypically. The major difference is
Andru [333]
<span>In order to know whether the plants are members of one population with great diversity or actually members of the same species we can attempt to find out whether they reproduce or not. That's one of the main aspects of two organisms of the same species - fertility.

We could start by setting up some kind of artificial environment where both plants would pollenise at the same time, or we could also collect the pollens from both plants and store it to use them in a different time of the year than that of their production. 

After having the pollens available from both plants we could fertilise a group of both plants with each other's pollens (the actual object of study), and also fertilise a group of both plants with their own pollens (so we can have a control for the quality of the pollens and the plants - in this group it is expected to have offspring, if there isn't we cannot take into account any other results).

After the fertilisation, we should now count the offspring. If there is offspring resulting from the crossed plants, they are probably of the same species. We could also compare these plants with the offspring of the normal crossing to check whether there were major differences (such as health issues, or offspring number) that would lead to conclude that still there wasn't compatibility. 

By creating a hybrid between this two groups, even if they are from the same species, we may have to take also into account that they may have different required conditions than their parent plants.

</span>The study should be repeated a few times or the number of plants involved should be large enough to be statistically relevant.
5 0
3 years ago
Activity
romanna [79]

Answer:

Pollution, crimes and overcrowding.

Explanation:

Lack of family planning is responsible for the rise of population. It brought many adverse changes in the environment such as pollution, crimes and overcrowding etc. Rise in population causes unemployment that leads to crimes in the society. It also produces pollution due to more human activities such as emission of fossil fuels and more industries should be built to provide basic needs to more population. Rise in population causes agricultural to be converted into residential area that leads to decrease food production.

7 0
3 years ago
How can the carbon stored in plants reach the atmosphere?
Nataly_w [17]

Answer:

Carbon stored in plants reaches the atmosphere via cellular respiration. Cellular respiration is the set of metabolic reactions that allows plants to convert the energy from nutrients into ATP (adenosine triphosphate) and then release the waste products. The energy from the glucose molecules is broken down into ATP. Water and carbon dioxide are also required to convert the nutrients into ATP. In our case, carbon and oxygen are waste products so they are released into the atmosphere via the pores underneath the leaf of a plant or tree. 

3 0
3 years ago
The three base sequence on a tRNA molecule is called
Radda [10]

The anticodon forms three complementary base pairs with a codon in mRNA during protein biosynthesis.

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