In this reaction _____.[The figure shows a scheme of a chemical reaction. The reactants are two molecules, one of which consists of A and B, the other - of C and D. The products are two molecules, one of which consists of A and C, the other - of B and D. The potential energy of molecules AB and CD is higher than the potential energy of molecules AC and BD.]
a. the products have been rearranged to form reactants
b. AC is a reactant
c. CD is a product
d. the products have less potential energy than the reactants
e. entropy has decreased

What kind of cell has a large, central, vacuole

Base your answer to the question on the information below and on your knowledge of biology. There are two different species of finch that live on the same small island, species A and species B. Both species successfully feed and reproduce on the island. Species A nests in pine trees and eats large seeds. Species B nests in hollowed-out dead logs and eats small insects. The factor most often acting as a selecting agent for the survival of a species in a particular location is the

the diagram represents the functional unit of a nervous system. which structure secretes a neurotransmitter

What instrument would scientist use to take measurements in the upper troposphere A. x-ray monitor
B. ice core bore
C. weather balloon
D. underwater sonar

"Ribosomes are described as the site of protein synthesis. Ribosomes consist of RNA and protein combined into a very particular shape. As a ribosome moves along an mRNA transcript, amino acids are joined together by peptide bonds. The formation of peptide bonds is facilitated by rRNA in the ribosome. Thus, rRNA can be described as a(n)"

Which of the following does not represent the empty set?

Ø
{0}
{}