All prokaryotes A. are unicellular.
B. have a nucleus.
C. have tissues.
D. have been engulfed by other cells.

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

Suppose that recording station n is located 200 km north of the epicenter of an earthquake, and recording station s is located 100 km south of the epicenter of the same earthquake. which of the following statements would be true?

If forces acting on an object are unbalanced. true or false