3)Amphibians hatch out of their eggs with:
A lungs and develop gills later.
B lungs and keep them their whole
lives.
C gills and develop lungs later.
D All of the above.

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

What is the problem in this article? what solution does the article propose?

Describe the relationship and movement between temperature and density in a convection cell. make sure you identify the direction of travel