Cnidarians have two main body types. which of these pairs of words describes the two common body types of cnidarians?
a. larva and egg
b. branches and fans
c. jellyfish and corals
d. medusa and polyp

Which of the following statements is most likely correct about a rock belonging to the jurassic age and a rock belonging to the cambrian age? options: 1) they have identical fossils of organisms that have evolved over time. 2) both have animal fossils preserved in them due to weathering and erosion. 3) they contain different fossils because life on earth has changed through time. 4) the fossils in them were formed on the surface of earth due to exposure to sunlight.

When the oxygen produced by photosynthetic plants in the water dissolves in the water, which of these is being formed?

The many stone tools, fragmentary animal bones, and teeth found at gran dolina, spain, indicate that hominids there? a. processed and consumed animals and other hominids. b. did not differ appreciably from earlier asian homo erectus. c. were similar to later homo sapiens. d. none of the above