Which group of fish do scientists believe amphibians evolved from?

A. jawless fish

B. cartilaginous fish

C. bony fish

D. lancelets

Mango is an example of what kind of trees?

Describes an organism that can exist only as a group of cells

In 1980, a group of scientists from The University of California at Berkeley found an unusually high concentration of iridium in a rock layer thought to be 65 million years old. Iridium is rare on Earth, but is sometimes found in meteorites.

When we are too cold, the muscular walls (do what?)

How does magma form rocks that look smooth and glassy

Which characteristics work well in a dichotomous key? a) smooth or rough b) green or round c) triangle or purple d) tall or bumpy

Which of the following is a characteristic that could be applied to both living and nonliving things

What is wrong with the cellular respiration equation?

What is involved in the synthesis of a new molecule?

As rescuers in a population becomes less available. the population