Walter and luis alvarez hypothesized that an asteroid impact caused the formation of a 66- million-year-old layer of clay containing high levels of iridium. how did geologists test this hypothesis? what evidence did they look for?

Monkeys and bats have similar bone structure in their forelimbs. however, monkeys have longer forelimbs to use for climbing and swinging in trees. bats have shorter forelimbs to use for flight. which term best describes how monkey and bat forelimbs are related to each other? a. homologous b. embryonic c. analogous d. vestigial

What is the maximum number of electrons that an atomic orbital can contain?

What shape would a molecule with two bound groups and two lone pairs have?