A slime coat called peptidoglycan covers the walls of many bacteria
Indicate whether the statement is true or false.
ANS: F, glycocalyx
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Hershey and Chase demonstrated that when the bacteriophage T2 infected its host cell, the ________ is injected into the host but the ________ remained outside.
Fill in the blank(s) with the appropriate word(s).
Damage to its flagellum would prevent a choanocyte from
A. circulating water through the sponge. B. stinging and capturing prey. C. secreting spongin to form the sponge body. D. producing the supportive spicules.
The occupation of space by a sessile organism, such as a barnacle, that precludes the establishment or occupation by another species is referred to as
A) preemptive competition. B) consumption competition. C) overgrowth competition. D) encounter competition.
Suppose a population of a new plant is found on an island. DNA sequencing determines that this plant shares a limited number of genes with plants on the mainland. Within the species, there is great genetic variability. This would suggest that
A) this plant species has been isolated on the island for a long period of time. B) DNA sequencing is unreliable for determining genetic linkages. C) this new species is more closely related to animals. D) this plant species is very closely related to plants on the mainland.