Which condition is inherited as a dominant allele?
A. Albinism;
B. Cystic fibrosis;
C. Tay-Sachs disease;
D. Huntington's disease.

What was the land like over 500 million years ago? what was under the sea?

Which phrase is the best summary of the model shown? a. the transfer of the sun's energy through trophic levels b. a series of aerobic and anaerobic reactions c. a transformation of light energy into chemical energy d. the breakdown of food molecules

What noticeable trend from this graph might be used to make a conclusion?