Occurs when an entire species cannot adapt to a long-term environmental change

Speciation

Extinction

Migration

What links the two strands in a dna helix together in the middle? a. phosphate groups b. sugar rings bonded together c. proteins d. bases with hydrogen bonds

Many organs are involved in the processes of keeping the blood and the body clean. when poisonous or harmful substances are in the blood, they are absorbed by the and released in a less harmful form. when wastes are present in the blood, they are filtered out and removed from the body by the

Mrna decodes information from the original dna master plan to build proteins in the during the process of ribosomes.