Enzymes and substrate fit together at the active site to form a lock and key mechansim. This means a) if they don't fit, it is the wrong substrate or the enzyme is denatured.

b) substrates work on enzymes, allowing them be be denatured.

c) the shape and size of the enzymes does not matter.

d) enzymes are not specific and work on a variety of substrates.

Sweating and breathing is an example of differentiation specialization maintaining homeostasis metabolism

Which statement describes a way in which the digestive and excretory systems work together? a. the nephrons absorb nutrients from food going to the large intestine. b. the excretory system balances blood gases in the small intestine. c. the intestinal villi filter blood and send wastes to the bladder. d. the excretory system balances the salts and water obtained from digested food

Gregor mendel is best known for his work with pea plants and for uncover many of the mysteries of genetics. one of his major findings stated that there were specific, physical units of inheritance that are transmitted during reproduction. what is the the name given to these units of inheritance which can be found on chromosomes? a) centromeres b) cytoplasm c) genes d) nucleotides