Some scientists believe that many years ago, most life on earth lived in water. over time, some fish grew small legs and lungs that allowed them to come onto land. these fish most likely did this because they a) needed to find shelter. b) were exploring new habitats. c) were trying to escape disease. eliminate d) were in search of food to eat.

Which skeletal system is represented by the shaded portion of the skeleton? spongy skeleton compact skeleton axial skeleton appendicular skeleton

Which statement describes how favorable traits in a population relate to natural selection? they are the only traits that ever exist in the population. they build in the population over time. they are rarely passed on to offspring. they are found only in a few individuals within the population.

In trying to determine whether dna or protein is the genetic material, hershey and chase made use of which of the following facts? a) dna contains sulfur, whereas protein does not. b) dna contains phosphorus, whereas protein does not. c) dna contains nitrogen, whereas protein does not. d) dna contains purines, whereas protein includes pyrimidines.