In researching the structure of DNA, Erwin Chargaff found the amount of adenine always equaled the amount of which other base?

A. thymine

B. cytosine

C. adenine

D. uracil

What is weather like in the deciduous forest? What are the five different zones, and how to they differ

Global climate change

The effector of a feedback mechanism is usually which part of the body? A) skin B) brain C) gland D) stomach

Giraffes evolved over many generations to have long necks. Giraffes that had longer necks were more likely to survive than giraffes with shorter necks because they had better access to food. This is an example of

When two sea caves on opposite sides of a headland are eroded and unite a (n) ___ forms

Beethovens final symphony no. 9 was the first symphony to ever use what?

How do elements reach stability?

Is there a difference between the theoretical probability of a child being affected by an autosomal recessive disease carried by both of her parents (as in Question 1), and the fraction of affected children you observe when generating a random

Explain how temperature can bring about changes in the state of matter.

The species name for the red maple is?