The trophoblast will provide nourishment for the embryo and give rise to the placenta.
Answer the following statement true (T) or false (F)
False
The trophoblast will provide nourishment for the embryo but it does not give rise to the placenta. It gives rise to the chorion.
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Which of the following provides the likeliest explanation for the differences seen in the human population?
A. presence of parasites in different areas B. amount of sunlight in different areas C. the altitude in different areas D. natural selection
Which of the following is NOT true? Both chloroplasts and mitochondria _____
A) have their own DNA B) have multiple membranes C) are part of the endomembrane system D) are capable of reproducing themselves
Muscle contraction works through the process of sliding two kinds of muscle filaments past each other.
a. true b. false
Viruses travel through animals mainly by lysing cells and then spreading to other cells. Plant cells are not easily lysed. If a pathogen enters a plant cell and does not initiate a hypersensitive response, what is the most likely way the virus would spread to other plant cells?
A. Through the chloroplasts B. Directly through the cell wall C. Through transport vesicles D. Through the plasmodesmata E. Through the central vacuole