Which of the following is NOT a distinguishing characteristic of prokaryotic cells?
A) Their DNA is not enclosed within a membrane.
B) They lack membrane-enclosed organelles.
C) They have cell walls containing peptidoglycan.
D) Their DNA is not associated with histones.
E) They lack a plasma membrane.
Ans: E) They lack a plasma membrane.
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Which of the following is not a type of microRNA?
A. Antisense RNA B. tRNA C. Riboswitch D. miRNA E. siRNA
A new plant forms from a stem that broke off of the parent plant. This is an example of _____
a. parthenogenesis c. vegetative reproduction b. exocytosis d. nodal growth
Anthrax is
A. a zoonosis. B. only seen sporadically in the United States. C. transmitted by contact, inhalation, or ingestion. D. a disease that, in humans, can cause a rapidly fatal toxemia and septicemia. E. All of the choices are correct.
The first organisms to colonize a disturbed ecosystem are the climax species
Indicate whether the statement is true or false