Which of the following was the LEAST likely factor in the Cambrian explosion? A. The emergence of predator-prey relationships between animals B. The accumulation of diverse adaptations such as shells and different modes of locomotion C. The movement of animals into land D. The accumulation of sufficient atmospheric oxygen to support the more active metabolism of mobile animals

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when it is at an intermediate population density

your answer is going to be physical weathering

1. amino acid refers to the fundamental building block of proteins, comprising of an amino group and a carboxyl group.

2. catalyst refers to any substance, which increases the rate of chemical reaction without being used up in the reaction.

3. a complex molecule containing he genetic code is dna or deoxyribonucleic acid.

4. an enzyme refers to a molecule of protein, which is unique in accelerating up a particular chemical reaction in the biological systems.

5. nucleic acid refers to an sequence of sugars, phosphates, and nitrogenous bases, for example, dna and rna.

6. a protein refers to a large, composite organic molecule comprising of a huge number of amino acids associated together with the of peptide bonds.

7. rna refers to a nucleic acid that takes part in the production of proteins.

8. substrate refers to a compound, which takes part in a chemical reaction, and is chemically modified by the reaction.