In the atmosphere can earth's surface by blocking sunlight.
a. dust or ash; cool
b. dust or ash; warm
c. carbon dioxide; cool
d. carbon dioxide; warm

characteristics of hydrocarbons

the answer is z.

the human body has five levels of organization. level 1: cells. cells are the basic units of life and form the first level of organization. cells in the human body have specific functions. examples include nerve cells, blood cells, liver cells, and so on.

artificial selection

explanation:

this occur when man select base on their intelligent