UV radiation will stimulate the skin cells to produce a molecule that will be converted into ________
a. folate
b. vitamin A
c. vitamin D
d. vitamin B
e. niacin
c
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The transport of milk proteins from where they are made to outside the cell is brought about
by what system?
a. endomembrane b. cytoskeleton c. nuclei d. lysosome
What are alleles?
A. the dominant form of a gene B. the locations of genes on a chromosome C. genes for different traits, such as hair color or eye color D. alternative forms of a gene for a single trait, such as blue eyes or brown eyes E. the recessive form of a gene
A number of populations of different species interacting with one another in a natural environment, such as a rotten log, is called
Select one: a. competition. b. a community. c. a biome. d. predation. e. symbiosis.
A relationship between the developing embryo and mother in which the eggs are fertilized internally and then deposited outside the mother's body to complete their development is called
A. external fertilization. B. ovoviviparity. C. oviparity. D. viviparity.