Hummingbirds and hawks illustrate:

Which of the given pairs are correct?
$I.$ Wings of insects and birds are homologous organs.
$II.$ Wings of bats and birds are homologous organs.
$III.$ Wings of insects and bats are analogous organs.
$IV.$ Wings of insects and birds are analogous organs.
Choose the correct option.

$Peripatus$ is a connecting link between:

Age of fossils in the past was generally determined by the radio-carbon method and other methods involving radioactive elements found in the rocks. More precise methods,which were used recently and led to the revision of the evolutionary periods for different groups of organisms,include:

What is the study of fossils called?

Who noted that embryos never pass through the adult stages of other animals?