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alex41 [277]
1 year ago
5

The contractile units of skeletal muscles are ________.

Biology
1 answer:
s2008m [1.1K]1 year ago
8 0

The  contractile units of skeletal muscles are myofibrils. Thus,option A is correct.

<h3>What is skeletal muscles?</h3>

Skeletal muscles are 32 to 40% of total body mass. The type of muscles that connect  to bones and allow to perform a wide range of movements and functions.

Skeletal muscles are easily controlled and work according to the desire .

Skeletal muscles are specialized tissue that is connected to bones and allows movement.

Therefore, the  contractile units of skeletal muscles are myofibrils. Thus option 1st is correct.

Learn more about myofibrils here:

brainly.com/question/1194286

#SPJ1

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DV
Georgia [21]

That question, this incomplete. The full question is:

3. Three redwood trees are kept at different humidity levels inside a greenhouse for 12 weeks. One tree is left outside in normal conditions. The heights of the trees are measured once a week. What are the dependent variables, independent and the controlled variable of this experiment?

Answer:

  • Independent variable: different humidity levels
  • Dependent variable: the heights of the trees
  • controlled variable: the types of trees

Explanation:

An independent variable is one that exerts an influence within the experiment and can be measured, acting on other elements to promote the observation of a result. As the experiment seeks to observe the influence of humidity on the height of the tree, we can say that humidity is the independent variable.

Dependent variable is that which is influenced by the independent variable to generate a result that can be observed, can also be measured. As the experiment wishes to analyze how the height of the trees was affected by the level of humidity, we can say that the height of the trees is the dependent variable.

Controlled variable is that which is present in the experiment in a constant and equal way, cannot be measured. This variable is the type of trees.

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Explanation:

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