Most plant cells are pluripotent, meaning that they
a. constantly switch tissue types throughout their lives.
b. cannot change after differentiating into a specific cell type.
c. end up as a hybrid of tissue types.
d. can function in any environmental condition.
e. retain the ability to change cell types when necessary.
E
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One mechanism of genomic imprinting silences an allele by DNA ____
a. methylation b. mutation c. transposition d. deletion e. inversion
Which of the following statements about rabies is incorrect?
A. Rabies is a zoonotic disease. B. Symptoms include anxiety, agitation, muscle spasms, convulsions, and paralysis. C. Wild populations of bats, skunks, raccoons, cats, and canines are primary reservoirs. D. Transmission can involve bites, scratches, and inhalation. E. The average incubation period in human is 1 week.
A number of populations of different species interacting with one another in a natural environment, such as a rotten log, is called
Select one: a. competition. b. a community. c. a biome. d. predation. e. symbiosis.
Protozoa can survive changes in pH, nutrient availability or temperature as (conidospores /cysts/trophozoites).
Fill in the blank(s) with the appropriate word(s).