Which statement explains why Mars and Venus most likely would not
support life as we know it on Earth?
A. The atmospheres of Mars and Venus are too dense.
B. Even a small amount of argon gas is deadly to life.
C. The percentage of oxygen in the atmospheres of Mars and Venus are
too low.
D. The high levels of carbon dioxide on Mars and Venus block all the
sunlight.

Which are forms of nitrogen that are usable by humans

Which of the following would be least likely to support the modern concept of biological evolution? ( 2 points) a)different species of organisms with similar bone patterns b)different species of organisms with similar reproductive rates species in c)different domains with similar metabolic pathways species in d)different kingdoms with similar cellular structures.

Read the following scenario to answer the following question. in some zoos, rare crosses between a male lion and a female tiger have produced hybrid offspring called "ligers." male ligers are sterile but some female ligers are fertile. in the wild, lion and tiger ranges do not naturally overlap, making such a cross unlikely. furthermore, the solitary behavior of tigers and the social organizations of lions create behavioral differences. applying the biological species concept, the sterility of ligers reveals that a. lions are probably a subspecies of tigers b. tigers and lions are the same species c. a new species called "ligers" is forming d. tigers and lions are separate species