As cells grow, the amount of surface area increases by the ____ but volume increases by the ____.
A. square (X2), cube (X3)
B. cube (X3), square (X2)
C. minute, hour
D. minute, day
A. square (X2), cube (X3)
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Answer the following statements true (T) or false (F)
1. Implantation of the blastocyst into the uterine wall is correlated with the degeneration of the corpus luteum. 2. Menstruation is initiated when progesterone levels increase. 3. The length of a pregnancy is influenced by the size of both the mother and the embryo. 4. The placenta develops from the endometrium while the fetus develops from embryonic tissue. 5. There is no possibility of a male contraceptive ever being developed for humans.
The width of a DNA double helix ____
a. is constant b. is narrower where adenine is present than where cytosine is present c. is wider where purines are present than where pyrimidines are present d. varies randomly e. is wider where pyrimidines are present than where purines are present
As K permeability increases, the rate of water movement into the osmometer ________
a. is unaffected. b. decreases. c. increases.
If a cross of two traits shows a 9:3:3:1 ratio, you know the organism was what?
A. Both heterozygous B. Both homozygous C. One of each