Abiologist discovers two new species of organisms, one in africa and one in south america. the organisms resemble one another closely. the best type of evidence in determining whether these organisms are closely related or are the products of convergent evolution. would be analysis of the behavior of the two species. a. true b. false

The diagram shows a fossil of an ancient whale skull and a skull of a present-day whale. the ancient whale is extinct and is believed to be an ancestor of the present-day whale. what do these skulls most likely show that supports darwin’s theory of evolution? all populations can adapt and survive. only some organisms have a common ancestor. populations change slowly over time. populations rapidly become extinct.

Read each description below and determine to which stage of sleep each pertains. then click and drag each box into the appropriate category below.

Ihave no idea how to solve these. plus there's another question that is 2) a 10 kilogram meteorite is collected in space and brought back to earth. it is composed of 1.25 kg of uranium-238 and 8.75 kg of lead-206. how many u-238 half lives have passed? what is the approximate age of the meteorite?