Which of the following is a pyrimidine base in DNA?

O

A. Adenine

O

B. Thymine

O

C. Guanine

O

D. Purine

What was the first generation of offspring in mendel's experiment calle?

More than 400,000 square miles of tall grass prairie that once covered the United States (95 percent of those original grasslands) have been destroyed.

Which brain structure interprets sensory input, controls skilled skeletal muscle movements, and is involved in emotional and intellectual processes?

Adenosine triphosphate is considered a high-energy compound. but how is that energy transferred to the cellular machinery? adenosine triphosphate is considered a high-energy compound.

What section of the kidney collects the urine?

Describe the range of variation in the nervous systems of invertebrates

How does volcanic ash form

What is one effect of immigration on a population living in an ecosystem? A) the competition for resources will increase. B) more animals will leave the ecosystem. C) biodiversity will decrease. D) the population will decrease.

A glucose molecule is the A. smallest type of protein. B. monomer of starch and cellulose C. largest of the carbohydrate polymers D. fundamental unit of genetic material

Which series correctly lists the eight taxonomic levels in order, from the broadest group to the most specific group? A. species, genus, family, order, class, phylum, kingdom, domain B. domain, kingdom, phylum, class, order, family, genus, species C.