Which of these results in the production of only one gamete as a result of meiosis?
A. oogenesis
B. spermatogenesis
C. Both of these are correct.
D. Neither of these are correct.
A. oogenesis
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Why are some body cells responsive to a particular hormone, whereas others are not?
A. Responsive cells express a specific receptor for the hormone. B. Responsive cells are located closer to the gland that releases the hormone. C. Whether or not a cell responds to a hormone depends entirely on what type of cell it is (liver cell vs. fat cell vs. nerve cell) because hormones only activate one type of cell. D. Responsive cells have complex signal transduction pathways, whereas cells that do not respond to a particular hormone lack these pathways. E. All of the answer options are correct.
Defective _____ cause color blindness
a. hair cells c. cone cells b. rod cells d. neuroglia
Sclereids are cells that:a
are found in wood and bark. b. conduct water and dissolved minerals. c. are usually found in nut shells and pits of stone fruits. d. conduct dissolved sugars. e. form cytoplasmic connections between cells.
If black fur color is controlled by a dominant allele (B) and brown by its recessive allele (b), give the genotypes of the parents if a black male crossed with a brown female and produces 1/2 black offspring and 1/2 brown offspring.
A. BB male and bb female B. Bb male abd bb female C. Bb male and Bb female D. BB male and BB female E. bb male and Bb female