An individual is said to be ________ if it has two copies of the same factor for a given trait.

The animal phylum that shows the greatest diversity, with the greatest number of species, is

Which of the following features assisted amphibians’ migration to land?

From the list, select all that apply to nucleotides found in DNA.

In flowering plants, a mature male gametophyte contains

The synthesis of which of the following hormones would be a logical first choice in an attempt to produce normal growth in mutant dwarf plants?

In prokaryotes, DNA containing a cluster of genes that are transcribed together are called an ________.

Land plants are composed of all of the following tissue types except

There are documented reports that consuming large amounts of genetically modified crops are harmful.

To turn genes off, a regulatory protein called a(n) ________ binds to a regulatory site to block access to the promoter