Which statement best describes how a catalyst can speed up a chemical reaction? the catalyst makes lower energy pathways available. the catalyst increases the concentration of products. the catalyst binds to enzymes to release substrates. the catalyst increases the concentration of reactants.

Which of the following is not considered an appendage of the skin? nails glands follicles none of the above

Monarch butterflies have brightly colored orange wings with black patterns on them, making them easily visible to birds that eat butterflies and moths, yet birds rarely eat the monarchs. likewise, the monarch caterpillars are brightly striped yellow and white and black, and they also are rarely eaten by birds, although some wasps will attack them and feed them to their young. what can be inferred from these observations? monarchs must threaten and attack birds, but not wasps. monarchs have a way of discouraging bird predation that does not involve hiding. monarchs’ wings are so colorful that most birds must find them difficult to eat. monarchs lay more eggs than other less conspicuous butterflies.

Who discovered tuberculosis bacteria?