What are organisms?
a. building blocks of proteins and origin of life
b. excess energy released by unstable atoms
c. groups of molecules that influence each other
d. the variety, distribution, and abundance of living things in an ecosystem

This aquarium exhibits biotic and abiotic factors in an aquatic environment. one of the abiotic factors is

What causes an unsaturated fatty acid to have a different shape than a saturated fatty acid? o a. unsaturated fatty acids have more hydrogen atoms. o b. unsaturated fatty acids have double carbon bonds. o c. unsaturated fatty acids have more nitrogen atoms. o d. unsaturated fatty acids have single carbon bonds.

Hedgerows have created a new ecosystem within britain’s a. farms b. cities c. forests d. industrial areas