13.this is the energy trapped by plants and used in the food manufacturing process.

A.Water

B.oxygen

C.light

D.carbon dioxide

14.it is composed of particles of varied sizes that provide for better aeration.

A.clay

B.sandy

C.loam

D.muddy

15.this causes the stratification or layering that exists in some ecosystem

A.light intensity

B.light duration

C.wavelength

D.frequency

16.how many subcategories does heterotrophs have?

A.1

B.2

C.3

D.4

17.these plants grow well in shady conditions

A.mesophytes

B.sciophytes

C.xerophytes

D.heliophytes

18.what would happen when the body has too much or too little heat.

A.it would make the body immune to deases

B.it will destroy health cells of the body

C.it can cause biochemical reactions to fail

D.it might result to energy deficient of the body.

Explanation:

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_TEAHYUNG1995