Answer:
Chains of amino acids make Proteins which fold to make a complex three dimensional shape.
Photosynthesis is a process mechanism in plants<3
Physical change as no new substance is created
Answer: It can decrease or increase a population of species.
Explanation: Limiting factors include the availability of food, water, shelter, and etc. When a population of species are limited in any of these, they either move or adapt to their environment. So, population tends to decrease. The population that may finds an abundance of resources will find that their numbers tend to increase. This cycle is repeated over and over again.
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The correct answer would be D) An observation that has a number associated with it.
