Match each example of Darwin's observations to the statement for which it provides evidence. Column A
Column B
1.
Species vary globally.
2.
Species vary locally.
a. As shown by fossils, many ancient organisms resembled
modern organisms, but were not identical to them.
b. Rabbits live in grasslands in Europe, but not in South
America and Australia
c. Brown birds with a variety of beak shapes live on the
Galapagos Islands
3.
Species Vary over time.

Building glycogen from glucose molecules is an example of what

Match the correct terms to their descriptions a system in which only energy but not matter is exchanged frozen water in snow part of geosphere that includes only soil a thin layer between the troposphere and the stratosphere cryosphere tropopause closed system pedosphere

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.