The most basic taxonomic group that can be defined as a collection of bacterial strains that share many common physiologic and genetic features is:
a. genus.
b. species.
c. class.
d. kingdom.
B
Bacteria are classified into the same species, based on their physiologic and genetic similarities and their differences from bacteria in other species.
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The part of the axon closest to the cell body is the
A. hillock. B. dendrite. C. soma. D. myelin sheath. E. nucleus.
The _____ dominates in the life cycle of bryophytes
a. gametophyte stage b. sporophyte stage c. haploid stage and sporophyte body d. diploid stage and gametophyte body e. the gametophyte and the sporophyte bodies both dominate
Which of the following is true of monocots?
a. have two cotyledons b. leaf veins usually netlike c. pollen grains with three pores d. vascular bundles distributed throughout stem ground tissue e. floral parts in multiples of fours and fives
What is the main way that a beaver can be a keystone species in its ecosystem?
a) it can serve as a food source b) it can introduce diseases into the ecosystem c) it can act as a predator d) it can provide aquatic habitat