Female fireflies emit flashes of light that attract males. This communication is an example of which characteristic of life?
a. maintaining homeostasis
b. metabolism
c. interactions with the environment
d. energy regulation
Ans: c. interactions with the environment
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The approximate resolving power of the unaided human eye is:
A) 0.2 cm. B) 0.2 mm. C) 0.2 ?m. D) 0.2 nm.
What are proglottids?
a. the anterior end of a tapeworm, which attaches to the host with suckers or hooks b. enzyme molecules excreted by parasitic worms to digest the host’s tissues c. a tapeworm segment containing an excretory system and reproductive structures d. a pair of organs attached to the anterior of a worm that it uses to collect food
Which of the following contribute to evolutionary change over time?
a. changes in RNA b. changes in DNA c. changes in proteins d. changes in cells
Which of the following is a producer?
A. mushroom B. rabbit C. pine tree D. red-tailed hawk E. cricket F. earthworm