Which of the following is NOT a common morphology of bacteria?
a. bacillus
b. coccus
c. spirillum
d. triangulum
Answer: D
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The extinction vortex
A. is what happens as a population decreases and becomes more vulnerable to extinction from a variety of causes. B. begins when one species in an ecosystem goes extinct and other species follow. C. is what happens when competing species fight over a single niche, often driving both species to extinction. D. is a spiral of events that occur once a species has become overcrowded through excess reproduction. E. is a spiral of events that includes introduction of competing species, overexploitation, and disease, in that order.
Rhizarians play what important role in the environment?
a. nitrogen fixation in soils b. bioremediation after chemical accidents c. sequestration of carbon in their calcium carbonate shells d. decomposition
Predator and prey populations ___________ over time
a. fluctuate b. remain relatively constant
Cyanide binds with at least one molecule involved in producing ATP. If a cell is exposed to cyanide, most of the cyanide will be found within the _____
A) mitochondria B) peroxisomes C) lysosomes D) endoplasmic reticulum