Speciation has definitely occurred when two groups of related organisms
a. cannot interbreed successfully
b. have drastically different behaviors
c. have drastically different behaviors
d. become permanently isolated from each other

The right option is; A. Cannot interbreed successfully

Speciation is a process within evolution in which new distinct species that are reproductively isolated from one another are formed. Speciation involves the disintegration of a single parent species into two or more genetically distinct species. During the process of speciation, species may not be able to interbreed successfully due to behavioral, genetic, or physical differences that arise between the new species.

the dna of humans and mice is almost 92% similar. this similarity indicates that . mice have a tail, while humans have a tailbone. the tailbone is a structure in humans.yes it's true.

i'm guessing this is from edg enuity so the answers would be, from top to bottom,

theodor schwann

matthias schleiden

robert hooke

rudolph virchow

anton van leeuwenhoek