The upper forelimbs of humans and bats have fairly similar skeletal structures, whereas the corresponding bones in whales have very different shapes and proportions. However, genetic data suggest that all three kinds of organisms diverged from a common ancestor at about the same time. Which of the following is the most likely 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.
The four stages of cross-bridge cycling in skeletal muscle.
Proportions of the genetic and physical maps are similar but not identical
Fossil remains of anatomically modern humans from the Czech Republic and from China (center crania)
hindbrain and midbrain structures
Like humans, monkeys need interaction to thrive. Those raised in isolation are unable to interact ...
The skeletal system.