What do you call similarities between species that were not inherited from a common ancestor, but evolved due to similar environmental pressures?

Fill in the blank: According to the _______ model, evolution occurs as the result of slow but continuous change in populations.

Which of the following statements is true? Phylogenetic tree 4.png

After an earthquake, a certain species of frog was split into two populations by a fault and the populations on either side of the fault began to diverge. After a period of time, some members of the two populations began to interbreed in a hybrid zone at one edge of the fault. Only weak reproductive barriers existed by this time, so the two populations could freely interbreed and re-establish gene flow. This outcome in a hybrid zone is known as _____.

Scientists Miller & Urey showed that …

What do scientists hypothesize was the cause of the Cretaceous extinction?

Stromatolites represent evidence of…

Which of the following allows speciation to occur over just one generation?

The figure to the right shows an outcrop of sedimentary rock whose strata are labeled A-D. If the fossils of two closely related species were found in stratum A, then fossils of their most recent common ancestor are most likely to occur in which stratum? fossil layers 1.png

Which property of life is depicted by the following description? A baby calf was born at about 31 kg, but after 5 years the adult kangaroo now weighs 45 kg.