Identical twins occur when ________
A) two eggs are released and are fertilized by two different sperm
B) two eggs are released and are fertilized by the same sperm
C) one egg is released and is fertilized by one sperm, and the pre-embryo later splits into two
D) one egg is released and is fertilized by one sperm, and the fetus later splits into two
C
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Why are diseases such as rabies that have a wild animal reservoir so difficult to eradicate while other diseases such as brucellosis that reside in domestic animals have been virtually eradicated
What will be an ideal response?
Which one of the following RNA types is most abundant in mammalian cells?
A. mRNA B. tRNA C. miRNA D. rRNA E. snRNA
Hardy-Weinberg can predict genotype frequencies from ____ frequencies
Fill in the blank with the appropriate word.
A primary advantage of using integrated nutrient management compared to inorganic chemical fertilizers is that
A. less organic fertilizer is needed than chemical fertilizers. B. only organic fertilizers contain micronutrients. C. organic fertilizers release nutrients more slowly. D. chemical fertilizers are not soluble in water. E. chemical fertilizers break down very slowly.