Answer:
exoskeleton
Explanation:
An exoskeleton is the hard outer covering that supports and protects some animals without backbones.
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Take in energy from the sun and convert that energy into chemical energy
Answer: "sexual dimorphism" .
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Answer:
Human heart is myogenic becoz it have the tendency to generate impulse by itself. The upper right auricle wall of heart has sino atrium node or SN node which helps in generation of impulse without any external stimulus.
<span>Cellular Metabolism - producing and using energy
</span><span>Reproduction - self explanatory.
</span><span>Molecular Transport - transporting all energy and products from one place to another within the cell and within the body. </span>
