If the same index fossils are found in two separate rock layers, the two rock layers most
a. reveal a disconformity.
b. reveal a nonconformity.
c. were formed at the same time.
d. were formed at different times.

Which worm has eyespots that are used to detect light? a fluke b marine worm c planarian d tapeworm

Many organizations release indexes used to measure the development of the world's countries. as we learned in this lesson, these indexes measure many factors, from life expectancy to happiness. in your opinion, what are the three most important factors we can use to determine how developed a country might be? explain your answers in a few sentences.

The embryos of a bird, a reptile, and a mammal are similar in appearance. how does comparing the physical appearance of embryos of different species support the theory of evolution? a. it shows that these organisms share a common ancestor. b. it provides evidence that these organisms eat the same foods.c. it shows that these organisms share the same habitat.d. it provides evidence that these organisms suffered a genetic mutation.