Which of the following is a function of the cell cycle that, in eukaryotes, involves mitosis?
A. cell replacement
B. speeding up evolution
C. production of gametes
D. sexual reproduction
A. cell replacement
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Mycorrhizae enhance plant nutrition mainly by _____
A) absorbing water and minerals through the fungal hyphae B) providing sugar to root cells, which have no chloroplasts C) converting atmospheric nitrogen to ammonia D) enabling the roots to parasitize neighboring plants E) stimulating the development of root hairs
Products and by-products of photosynthesis do NOT include
(a) O2. (b) C6H12O6. (c) CO2. (d) H2O.
Most of an organism's DNA is carried by its __________.
A. mitochondria B. chromosomes C. nucleoli D. endoplasmic reticulum
Which of the following is a defining characteristic that all protocells had in common?
A) the ability to synthesize enzymes B) a surrounding membrane or membrane-like structure C) RNA genes D) the ability to replicate RNA