The four covalent bonds in methane (CH4) are arranged around carbon to give which one of the following geometries?

#Question id: 4616

#Zoology

Logically, which of these should cast the most doubt on the relationships depicted by an evolutionary tree?

#Question id: 4617

#Zoology

Which of the following is not an observation or inference on which natural selection is based?

#Question id: 4618

#Zoology

Which of the following observations helped Darwin shape his concept of descent with modification?

#Question id: 4620

#Zoology

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?

#Question id: 4621

#Zoology

DNA sequences in many human genes are very similar to the sequences of corresponding genes in chimpanzees. The most likely explanation for this result is that

#Question id: 4625

#Zoology

During a study session about evolution, one of your fellow students remarks, ʺThe giraffe stretched its neck while reaching for higher leaves; its offspring inherited longer necks as a result.ʺ Which statement is most likely to be helpful in correcting this studentʹs misconception?