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aleksandrvk [35]
3 years ago
10

Ritchie was investigating different types of cells. He read how long dendrites of this cells enable it to send and receive messa

ges quickly.
A. a red blood cell

B. A muscle cell

C. A nerve cell

D. A heart cell
Biology
1 answer:
makkiz [27]3 years ago
4 0
C lol...............
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A controlled experiment is when the experimenter can change one variable in the experiment and completely change the results.

Redi experiment involved a closed jar with rotting meat on the inside. He waited for a few days and found no new forms of life in the jar.
He then did the same experiment, but this time he took the lid off the jar. After those few days he found there were maggots in the rotting meat from flies.

This is a great example of a controlled experiment, because he only had to change one variable to completely change the results. In this case that variable was just removing the lid from the jar.

Redi was trying to prove spontaneous generation with his experiment. Although, it failed.

Spontaneous generation: When life forms from non-livings.

Redi disproved spontaneous generation, but proved biogenesis.

Biogenesis: When life comes from other living beings.

He proved biogenesis because the flies had reproduced when the jar was opened.
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Two people are exercising at a gym. Person X notices a burning sensation in several muscles, while person Y does not feel any di
Alex Ar [27]

Answer:

See the answer below

Explanation:

Person X is feeling a burning sensation in several muscles<u> because of the accumulation of lactic acid due to inadequate oxygen in their system.</u> When oxygen becomes inadequate during exercises, anaerobic respiration takes place to augment the oxygen shortage and this leads to the production of lactic acid which accumulates up in the muscles and gives a burning sensation.

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Person Y does not feel any burning sensation in their muscles <u>because oxygen is adequate in their system and they do not need to respire anaerobically.</u> <em>Person X exercise regime must have been more rigorous than that of person Y.</em>

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Answer:

The answer would be B.

Explanation:

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Getting fit, C, changes them in terms of self-esteem and confidence

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Energy enters the ecosystem via sunlight as solar energy

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