Which of the following is NOT a fatsoluble vitamin?
a. vitamin B
b. vitamin K
c. vitamin D
d. vitamin A
a. vitamin B
Vitamin B is a water-soluble vitamin.
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A significant event influencing the rapid evolution of plants on land after their initial appearance was the ____
a. increase of atmospheric oxygen b. reduction of ultraviolet radiation penetration through the atmosphere c. stabilization of global climates d. increase in soil nutrients e. merging of land masses
A population with zero growth is indicated by
a. A. b. B. c. C. d. D. e. none of these.
Offspring with four phenotypes in a 1:1:1:1 ratio can be produced by
A. AaBb ´ AaBb. B. AABB ´ AaBb. C. AaBa ´ AABb. D. AaBb ´ aabb.
When does the human embryo implant in the wall of the uterus?
A) within a few hours of fertilization
B) about a day after conception
C) about a week after conception
D) just after gastrulation