In dna molecules nucleotides bond together according to the nitrogenous bases. which of the following correctly describes how nitrogenous bases bond together?
a). purines bond to other purines
b). purines bond to pyrimidines
c). purines and pyrimidines can bond with themselves and each other
d). pyrimidines bond to pyrimidines

The serengeti plains are part of the african savanna ecosystem and are home to a variety of different species of plants and animals. the serengeti plains experience a seven-month period of seasonal drought each year, during which the ecosystem receives only four inches of rain and the availability of some resources becomes very scarce. which type of limiting factors does the seasonal drought in the serengeti plains affect?