Each of the following is true with regard to cancer cells except
A) growth does not require growth factors.
B) ghe cell cycle may be disrupted.
C) most cancer cells age and die after 50 divisions.
D) growth may proceed despite high levels of DNA damage.
E) ghe apoptosis pathway may be blocked.
Answer: C
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Answer the following statement true (T) or false (F)
Despite abundant vegetation, ________ make poor farmland because of little topsoil and scant soil nutrients
Fill in the blank(s) with correct word
Sickle-cell anemia is a condition in which individuals produce defective red blood cells which cannot effectively transport oxygen to the tissues in the body. Homozygosity for this mutation is usually lethal, whereas heterozygosity is non-lethal and can even result in a resistance to malaria. This is an example of which of the following?
a) codominance b) additive effects c) a multigene trait d) sexual selection e) incomplete dominance
Compare and contrast passive and active transport mechanisms, and give an example of each
What will be an ideal response?