Which cell type produces an enzyme that lengthens telomeres?
a. cancer cells
b. red blood cells
c. cells in gonads that produce sperm and oocytes
d. both cancer cells and red blood cells
e. cancer cells, red blood cells, and cells in gonads that produce sperm and oocytes
E
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It would be an advantage to have the absence of petals (or reduced petals) in a plant that
distributes pollen via
a. animals. b. humans. c. water. d. wind.
The opening of the uterus is the ____
a. ovary b. oviduct c. vagina d. cervix e. uterus
All of the following are examples of prezygotic genetic isolating mechanisms EXCEPT:
a. Male fireflies of different species have different flash patterns. b. Three closely related orchid species flower on different days. c. The progeny of a cross between two different lizard species fail to develop properly. d. One species of snake lives in water and another is terrestrial. e. Peeper frogs mate in April, and tree frogs mate in June.
An example of biomagnification is the ability of Desulfovibrio to catalyze production of methyl mercury, which is lipid soluble, thereby increasing the concentration of mercury in the food chain.
Answer the following statement true (T) or false (F)