Ecosystems and elements

________ is needed to break the bonds of glucose releasing energy throughout the cell.

• hydrogen

• oxygen

• carbon

• chlorine

_____ makes up 1% of our body and is found in our teeth, bones, and in nucleic acids.

• oxygen

• sulfur

• sodium

• phosphorus

Water is made up of _____ and ______ .

• hydrogen and oxygen

• hydrogen and nitrogen

• potassium and oxygen

• hydrogen and carbon

Carbon dioxide enter the plant through the ____ .

• roots

• stem

• stomata

• flower

_________ is the waste product of cellular respiration.

• hydrogen

• carbon dioxide

• potassium

• oxygen

______ is a type of symbiosis where both organisms benefit.

• parasitism

• mutualism

• commensalism

• beneficialism

_______ is the vine that ate the south. It is an invasive species because it is not native to the area.

• legumes

• crab apple

• Tumble weeds

• kudzu

Limiting factors are usually ________.

• biotic

• abiotic

• not found in an ecosystem

• have no effect on the carrying capacity of an area.

Food, water, shelter, and space are __________ .

• limiting factors

• carrying capacity

• biotic

• elements

__________ is the most abundant element in the atmosphere at 78%.

• oxygen

• carbon dioxide

• nitrogen

• hydrogen