Ovulation is triggered by surge of which of the following hormones?
A. luteinizing hormone
B. follicle stimulating hormone
C. estrogen
D. testosterone
E. progesterone
A
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In the 1980s and 1990s, positional cloning led to the discovery of genes that
A) encode all proteins in the human genome. B) cause hemophilia, fragile X syndrome, and colorblindness. C) cause several types of cancers. D) cause Duchene muscular dystrophy, cystic fibrosis, and Huntington disease.
The similarity of mitochondria and chloroplasts to bacterial cells led to the development of the ________, which proposes that these organelles are derived from bacteria
Fill in the blank with correct word.
Most of the carbon on Earth is held in ____
a. sediments and rocks b. oceans c. soil d. atmosphere e. land biomass
Which action is unable to produce variation?
A. Crossing over B. Random alignment of chromosomes during meiosis C. Asexual reproduction D. Genetic recombination of alleles E. Sexual reproduction