The developing organism is a fetus.
Answer:
Charles Darwin is best know for Natural selection
Answer:
Earthquakes and Volcano activity
Explanation:
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The answer is alveolates. The sac-like structures under their plasma membrane are called alveoli. The alveoli provide support to the plasma membrane. Examples of groups of alveolates are ciliates, such as Paramecium, dinoflagellates, apicomplexa, and foraminifera. They lie under the phylum, Ciliophora.