Which mechanism(s) increase(s) genetic diversity?
a. crossing-over between chromosomes during meiosis only
b. independent assortment of chromosomes during meiosis only
c. random DNA mutations only
d. crossing-over between chromosomes and independent assortment of chromosomes during meiosis only
e. crossing-over between chromosomes, independent assortment of chromosomes during meiosis, and random
DNA mutations
ANSWER: e
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According to the endosymbiotic theory, why was it adaptive for the larger (host) cell to keep the engulfed cell alive, rather than digesting it as food?
A) The engulfed cell provided the host cell with adenosine triphosphate (ATP). B) The engulfed cell provided the host cell with carbon dioxide. C) The engulfed cell allowed the host cell to metabolize glucose. D) The host cell was able to survive anaerobic conditions with the engulfed cell alive. E) The host cell would have been poisoned if it had digested the engulfed cell.
Organisms store energy as______
a. starch b. glycogen c. fat d. sugar e. starch, glycogen or fat
Which bacterial structure is found internally in the cell?
a. flagellum b. pilus c. plasmid d. capsule e. cell wall
Angela would like to look at living algae from pond water. What type of equipment should she use?
A. her naked eye B. magnifying glass C. transmission electron microscope D. compound light microscope E. scanning electron microscope