Which era follows the end of the Cretaceous period?

1. Precambrian

2. Mesozoic

3. Paleozoic

4. Cenozoic

Energy moves along a food chain when A. animals drink water from a stream. B. animals breathe air. C. plants use the Sun's energy to make food.

Why is tcs food likely to become unsafe? a. pests are more attracted to it. b. pathogens grow well in it. c. it doesn't come from approved suppliers. d. it contains chemical contaminants?

What 3 states have the largest tree

What are fish-eating marine mammals that have sleek, short bodies and wide flippers for swimming? a. pelicans b. penguins c. sea turtles d. seals

In what way is observation important in ecological inquiry

When does a wheel and axle have a mechanical advantage greater than one?

What do cells need to do between divisions to make sure that a full set of dna gets passed on to each daughter cell?

True or false: The central nervous system allows us to sense the environment

Which of the following statements is false regarding root hairs? a. they are outgrowths of endodermal cells c. they increase the surface area of the root b. they are outgrowths of epidermal cells d. they absorb water and nutrients

Why is it critical to divide the chromosome number in half?