What cell type in animals has a flagellum?
a. the ovum
b. kidney cells
c. liver cells
d. the sperm cell
e. the hair follicle
Answer: d. the sperm cell
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Explain how meteor showers and comets are related. Explain how we know meteor showers occur each year
What will be an ideal response?
In reptiles, the circulatory system of the lungs is nearly completely separate from the circulatory system of the rest of the body
Indicate whether the statement is true or false
When offspring are infertile after breeding occurs between individuals of different species, the genetic identities of the two populations are protected by
A) mechanical incompatibility. B) hybrid infertility. C) genetic isolation. D) temporal isolation. E) behavioral isolation.
The majority of mature, self-tolerant lymphocytes are found in
A) the MALT. B) lymph nodes. C) the thymus. D) the spleen. E) the tonsils.