Valerie hypothesizes that frogs lay more eggs in warm water than in cold water. When Valerie designs her experiment, what should be the only variable that changes?

A.

frog species

B.

time of year

C.

water temperature

D.

water flow rates

Witch gas makes up 78 persent of earths atmosphere

What is very unusual about creatures known as Tardigrades?

What are 3 ways lithosphere moves at plate boundaries?

During the investigation of a murder case, the police found a few bloodstains on the body of the victim, a few bloodstains on the wall nearby and a few hair follicles by the victim.

Definition of eukaryotes and prokaryotes? Definition of positive gram and negative gram?

Select ALL of the items below that were Hitler's beliefs which then became part of Nazi ideology. Question 2 options: Germans are members of the Aryan master race. It is not necessary to conquer territory.

Introduced species can threaten biodiversity because they

Which of the following statements does not describe a problem with modern landfills? A. Materials buried in landfills decompose in three years. B. Chemicals leaking out of the waste stored there may pollute wells or groundwater supplies. C.

Describe the basic functions of living organisms

In 1783 Antoine Lavoisier showed that the heat produced by respiration was comparable to the heat produced when charcoal was burned. This expeiment shows the similarity between respiration and A) boiling B) combustion C) ignition D) melting