As an environment changes, and some organisms have a higher fitness than others, natural selection acts directly on a. existing variations.
b. genetic material.
c. acquired traits.
d. individual organisms

Draw a simple labelled diagram if a collenchyma tissue

The upper forelimbs of humans and bats have fairly similar skeletal structures, whereas the correspondingbones in whales have very different shapes and proportions. however, genetic data suggest that all three kindsof organisms diverged from a common ancestor at about the same time. which of the following is the mostlikely explanation for these data? a) humans and bats evolved by natural selection, and whales evolved by lamarckian mechanisms. b) forelimb evolution was adaptive in people and bats, but not in whales. c) natural selection in an aquatic environment resulted in significant changes to whale forelimb anatomy. d) genes mutate faster in whales than in humans or bats. e) whales are not properly classified as mammals.

You are looking through a microscope and see that a teraf has formed. which phase of meiosis is in the cell in?