Scientists have found evidence that asteroids collided with Earth during its past. What have these impact events been connected to? A. neither global climate changes nor mass extinctions

B. both mass extinctions and global climate changes

C. global climate changes but not mass extinctions

D. mass extinctions but not global clim changes

Study the picture of the ocean. which is the best example of an organism’s niche shown in the picture? a. the environment contains several of the same species of coral. b. the shallow area of the ocean meets the needs of the coral and the fish. c. the ocean has fish and coral that live in the same area. d. the coral take in food from the water and provide shelter for the fish.

Areal dna molecule consists of thousands of these pairs of nucleotides. what is the pairing arrangement of the nitrogen bases

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