Answer: Under these conditions, water osmosis causes water to accumulate in the cell from the external environment. The contractile vacuole acts as part of a protective mechanism that prevents the cell from absorbing too much water and possibly lysing (rupturing) through excessive internal pressure.
The pyloric valve control food movement from the stomach into the small intestine.
Answer: A zygote
Explanation:
a diploid cell resulting from the fusion of two haploid gametes; a fertilized ovum.
Answer:
Explanation:
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