What would the consequence be if spermatogonia were not stem cells?
A) Mature spermatids would make more sperm by meiosis.
B) Sperm would have to be produced by mitosis instead of meiosis.
C) Only a limited quantity of sperm could be produced by males, and then no more could be produced.
D) Sperm would be diploid rather than haploid.
Answer: C
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Why should you not eliminate all carbohydrates from your diet?
1.Carbohydrates taste too good to give up. 2.Fiber is a carbohydrate and you need fiber for proper digestive function. 3.Your body can only use carbohydrates to make ATP. 4.No other food resources can be converted into a useful form for metabolism.
The "Age of Fishes" is an informal name for which time period?
a. Silurian period b. Permian period c. Devonian period d. Ordovician period e. Carboniferous period
The phase change of an apical meristem from the juvenile to the mature vegetative phase is often revealed by _____
A) a change in the morphology of the leaves produced B) the initiation of secondary growth C) a change in the orientation of preprophase bands and cytoplasmic microtubules in lateral meristems D) the activation of floral meristem identity genes
Infectious proteins that are heat resistant and that cannot be destroyed by ultraviolet light or most chemicals are known as ________
Fill in the blank(s) with correct word