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:
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<span>A true hypothesis starts the with word if and list the IV , continues with then and states the DV , and closes with because to explain the reasoning.</span>
Hello Ecool, thank you for asking a question here on Brainly!
You Asked ➤ Certain species of ______ are now recognized as indicators of environmental pollution.
↴ OUR CHOICES ↴
A. Lichen
B. Mushroom
C. Yeast
D. None of the above
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ANSWER ➤A: Lichen
Explanation: Certain species of lichen are now recognized as indicators of environmental pollution because they have a chemical defense strategy in their habitat. Research has shown that half of lichen species will have some type of chemical that is antibiotic. Because of this, they are seen as indicates of environmental pollution.
I hope this answer is helpful to you, but please let me know if you have any other questions regarding it.
<em>- Qamar
</em>
B. Defecation is a process that uses a lot of water. To compensate for this the large intestine absorbs water back into the body before having waste leave the body.