Scientists notice structural similarities between fossils of a land animal and an aquatic organism. they know the similarities are not a result of the two organisms having to adapt to similar environments. what can they attribute the structural similarities to?

Which of the following occurs most often in a population when genetic variation and overproduction are present? some organisms have a lower reproductive success than others. some organisms have a higher reproductive success than others. some organisms have no reproductive success. some organisms do not have genetic variation.

Control of the body is accomplished by which of the following body systems? nervous system and circulatory system endocrine and repertory system circulatory and respiratory systems nervous system and endocrine systems

Temperatures in ponds and lakes vary by season. select the best answer from the choices provided t f