In a dihybrid cross aabb × aabb, what proportion of homozygotes for only one of the genes (not both) is expected among the f2 offspring

Why is the theory of evolution important? it disproves all other theories about how life began. it provides a topic for debate. it is a unifying concept in biology. it explains how life began. i know for sure, it is not "it is a unifying concept in biology."

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

Select the star life cycle that is accurate