Inside eukaryotic cells are membrane-bound structures called
A. cell walls
B. cilia
C. organelles
D. cytoplasm
Answer: C. organelles
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Answer the following statements true (T) or false (F)
1. r-selected species tend to have type III survivorship curves. 2. Drought and floods are considered to be density-dependent factors potentially affecting population size. 3. In a demographic transition, death rates decline before birth rates. 4. Worldwide human population growth has been exponential since the Industrial Revolution.
What events can lead to offspring having a unique arrangement of their parents' genes?
A) Crossing over B) Independent assortment C) Both of these D) Neither of these
Refer to Figure 51-3. The allantois is identified by number:
a. 1.
b. 2.
c. 3.
d. 4.
e. 5.
Why is it important that you take care of your neurons?
A) They are able to divide rapidly and can be turned into cancer cells. B) They only undergo mitosis after the brain has obtained enough sleep. C) They are unable to divide by mitosis. D) They are very susceptible to mutations of their DNA.