ANYONE PLEASE HELP ME I WILL MARK IF CORRECT Which statement best describes a difference between electromagnetic waves
and mechanical waves?
A. Electromagnetic waves vibrate in two directions that are
perpendicular to each other.
B. Electromagnetic waves require empty space to transfer energy
from one place to another.
C. Mechanical waves transfer matter, not energy, from one place to
another.
D. Mechanical waves can transfer matter through empty space.

18. how do the cells in meiosis differ from the cells in mitosis?

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.

In the sentence "a mining company will consider the distribution of coal when deciding how to mine the coal," what does the word distribution mean?