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galben [10]
3 years ago
14

After Pedro had breakfast, he went for a run. Identify at least three energy transformations that had to take place to allow Ped

ro to complete his run. Then use evidence to support the claim that energy in this system was conserved as it was transformed.​
Biology
1 answer:
FromTheMoon [43]3 years ago
8 0
I tried my best to answer.

1) Chemical to mechanical (calories -> muscle contractions)
2) mechanical to mechanical (muscle -> motion)
3) mechanical to thermal (motion -> heat from the body causes sweating)

The potential energy is stored in the body chemically (via food). That potential energy is then released when the body is put in motion.
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Why did Darwin see savage competition as a creative process?
tekilochka [14]

Answer: According to Darwin theory of evolution the struggle for existence is considered as major part for competition among living things.

Explanation:

Coexisting species that belong to the same genera compete for same kind of resources for their survival. Some phenotypic variations gives an survival advantage over others. The superior ones dominate the inferior ones and compete for resources. The one who receives the resources like mates, food, shelter, and others the chances of survival also increases considerably.

3 0
3 years ago
During the Carboniferous period, plants and animals grew very large due to high concentration of A. oxygen in the atmosphere. B.
Alja [10]

Answer:

Option A, oxygen in the atmosphere

Explanation:

The highest level of oxygen reached during this phase of the geological cycle of earth. The oxygen level in  Carboniferous  period accounted for 35%  as compared to 21% of oxygen in the atmosphere in present time.

Due to high oxygen content, the giant and wide varieties of terrestrial animal and plant species evolved. For example – size of insects and carwlies increased, plant became extremely giant, increase in number of tree ferns etc.

7 0
3 years ago
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Without heat from the Sun, the water cycle would A) reverse. B) not work. Eliminate C) slow down. D) not be affected.
allsm [11]
"not work" would be your answer
6 0
3 years ago
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Which cell junctions form a barrier to the passage of materials?
kkurt [141]

Answer:

The correct answer is - tight junctions.

Explanation:

Tight junctions are one of the cell-cell junctions that make a barrier to the passage of material which is a present in epithelia. This barrier is impermeable to most of the materials with soluble molecules. This barrier is made up of the occludin and claudin proteins.

Tight epithelia have tight junctions and examples of such junctions are the distal convoluted tubule or DCT, and the collecting duct of the nephron in the kidney.

Thus, the correct answer is - tight junctions.

8 0
3 years ago
Can you cry underwater?<br> Is it possible I need full explanation <br> Thanks I’ll give brainliest
s2008m [1.1K]

Answer:

The answer however is yes you can, but you would probably die. The body mechanism for crying under water works just as fine above as below the water. So you can cry tears, they would just be mixed with the rest of the water.

Explanation:

6 0
3 years ago
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