Compound eyes

a. contain thousands of lenses.
b. are attached to antennae.
c. can move independently.
d. all of these

Which part of cellular respiration must occur before any of the other steps can occur

Gram-negative bacteria have a cell wall that is! and does not accept the stain, making itappear

Lactase is essential for digesting lactose in milk. this enzyme is specific for this sugar. why? molecules and active sites vary in size; only properly sized molecules can fit.there is a precise compatibility between the active site and the lactose molecule.specificity refers to the action of the enzyme, such as hydrolysis, and relatively few molecules can be hydrolyzed.reaction-specific enzymes assume a fit by folding around the most numerous substrate molecules.