What caused the Devonian mass extinction?

a meteorite

global cooling

humans

none of the above

This type of macromolecule stores and transmits genetic information

Fibrous root systems have many small roots. Is this true or False.

According to the induced fit hypothesis of enzyme catalysis, which if the following is correct? A. The binding of the substrate depends on the shape of the active site B. Some enzymes change their structure when activators bind to the enzyme C.

A one-way relationship in which one species benefits and directly hurts the other is called

You look under a microscope at an unknown organism and you observe 24 homologous pairs of chromosomes. What type of cell are you observing and how do you know?

Why do you think more blood goes to some organs and not others?

Which of the following would most likely employ a forester? A. a state governments B. lumber businesses C. national govemments D. all of the above

How do environmental scientists use technology to track polar bears?

A rock formed from liquid magma at temperatures above 1000 degrees Celsius and the. Cooked and hardened what type of rock is it

You sample a population of butterflies and find that 56% are heterozygous at a particular locus. What should be the frequency of the recessive allele in this population? A. 0.07 B. 0.08 C. 0.09 D. 0.70