The structural level in which the muscle produces the contraction is known as the muscle fiber.
<h3>What is a muscle fiber?</h3>
A muscle fiber is a single muscular cell that is able to contract by using specialized proteins such as filaments of myosin and actin.
This unit (muscle fiber) is able to contract both in vivo and in vitro by establishing suitable environmental conditions (e.g., proper calcium levels).
In conclusion, the structural level in which the muscle contracts is the muscle fiber.
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The first one, <span>By having white blood cells to attack pathogens. this is because blood also has white blood cells. and the immune system has pathogens. so the blood cells help attack pathogens.</span>
Answer:
C. The weight loss of the mice
Explanation:
There are two variables present in the experiment;
- The time of the day that the mice rane
- The weight lost of the mice in each time test
The time of the day varies from morning, noon to evening. This variable is independent of any other aspect.
It shall always be morning noon and evening in every single day.
The time of the day shall determine the amount of weight loss.
Each time shall vary in the amount of weight loss.
Thereby weight loss becomes our dependent variable.
Example: Darwin’s Finches
In evolutionary biology, adaptive radiation is a process in which organisms rapidly diversify from ancient species to a wide range of new forms, in particular when environmental changes provide for new resources, create new challenges or open new niches to the environment.
The following are the four main gorups
1-Protozoans with Pseudopods
2-Ciliates
3-Flagellates
4-<span>Parasitic Protozoans</span>
