Animals, they only have a cell membrane, not cell walls.
I don't know what the answer choices were, though, but I hope this helps.
Answer: a change in the temperature of the materials
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Answer:
I dont know what your asking but ill try to answer it
Explanation:
Prey population is going up over time than the predator population has.
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Where two organism reproduce and have a offspring like themselves.
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Answer:
In the case of the algae, each individual cell is responsible for absorbing its own water. This makes the algae nonvascular compared to the highly vascular plant species. In this connection, algae also lack several key structures that are normally present in ordinary plants like the leaves, roots and stem.