Igneous rock can not be formed from hardened rock.
The answer is D. Remember that biology is the study of life.
hello,
Heterotrophic. Only plants have cell walls, so that goes to phytoplankton, and whales have thousands of cells, so unicellular goes to plankton again. Mammals aren't prokaryotic, so we're left with heterotrophic.
-Bell
By showing how living things get energy from another.
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.
Learn more about muscle fibers here:
brainly.com/question/27960158
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