Fishes were first abundant during the

A. Precambrian

B. Paleozic

C. Mesozoic

D. Cenozic

A protein called GEF-H1 is known to control immune responses to certain viruses such as influenza A. GEF-H1 is best classified as which kind of protein? a) a structural protein b) an antibody c) an enzyme d) a messenger protein

The first plants to colonize land were the: A. gametophytes. B. bryophytes C. pteridophytes D. lycophytes E. B and C are correct

What might be one reason that butterflies have different wing patterns?

What is likely to happen if a new organism that feeds off mice is introduced? a. The mice population will increase in response to the arrival of the new organism. b. The mice population, grasshopper population, and plant population will all increase.

Scientists decide the age of different rock layers by the things that they uncover in the rock. Which of the items below could scientists use to date a layer of rock? A.) a green leaf that fell off a tree B.) an insect flying near the dig site C.

Is mold that grows on bread a decomposer a producer or a consumer

In the Atlantic which part of the oceanic crust is older

Item 2 Put the following in order from smallest to largest: Organism Tissue Organelle Organ Organ System Cell

you looked at a cross section of a bone. Describe how you could model theinterior structure of an entire body?

During which cellular process does telophase occur