The placenta forms from embryonic tissue and
A) bone marrow.
B) amniotic fluid.
C) the embryonic disk.
D) endometrium.
E) the yolk sac.
D
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A root hair is an extension of a(n) endodermal cell. Indicate whether the statement is true or false
The myelin sheath is formed by _______________, which wrap around the axons of some neurons.
a. cell bodies b. synapses This answer is incorrect. c. Schwann cells d. dendrites e. nodes of Ranvier
In some plants such as mosses and ferns, there is a multicellular stage in the life cycle that is haploid and a different stage that is diploid. What can you conclude from this?
A) The haploid cells must undergo twice as much mitosis in order to produce a diploid stage. B) Haploid cells must undergo mitosis to produce a multicellular haploid stage. C) Meiosis must happen over and over to produce as many haploid cells for a multicellular haploid plant. D) Haploid cells must undergo meiosis to form gametes.
The ability of bread to rise is mainly a function of the CO2 produced anaerobically during oxidative phosphorylation.
Answer the following statement true (T) or false (F)