When a substance or large molecule is enclosed by a membrane in a vesicle within the cell, the membrane of the vesicle fuses with the cell membrane and releases the substance out into the cell's surroundings. This is: A exocytosis B endocytosis C facilitated diffusion D osmosis

A

Explanation:

The correct answer would be exocytosis.

Exocytosis is a form of active transport in living cells involving the movement of materials from the inner part of the cell to the outside of the cell. The process is said to be active because it involves the expedition of energy in the form of ATP.

During exocytosis, vesicles housing molecules from the inner part of the cell are transported to and fuse with the cell membrane. The vesicles then expel their contents to the outer part of the cell.

Correct option: A

4.) metal

"-the movement of carbon from the nonliving environment into living things and back to the environment

-carbon is the essential component of proteins, fats, and carbohydrates (which make up all organisms)

-carbon exists in air, water, and living organisms

-producers convert carbon dioxide in the atmosphere into carbohydrates during photosynthesis

-bacteria in the atmosphere cycles through the system in filtration units

-in cellular respiration, carbon is released back into the atmosphere as carbon dioxide

-some carbon is stored in limestone (forming one of the largest "carbon sinks" on earth)

-largest carbon reservoir on earth= limestone

-carbon stored in the bodies of organisms as fat, oils, or other molecules may be released into the soil or air when the organism dies

-this may form deposits of coal, oil, or natural gas (fossil fuels, which increased the atmospheric carbon dioxide)

-fossil fuels store carbon left over from bodies of organisms that died millions of years ago

-they are located in the surface of earth, deep within the earth and beneath the ocean floor."    

"do a testcross with a homozygous recessive plant."