Clinical trials model the effects of new drugs on human society. which of the
following is used to avoid bias in a clinical trial of a new drug?
a. high self-confidence
b. data manipulation
c. double-blind testing
d. personal interest

Name the plastid and pigment likely to be found in the cells of (a) petals of sunflower (b) ripe tomato.

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.

Did the vinegar diffuse all the way to the center of any of the cubes? if so, which ones? what does this tell you about surface area-to-volume ratio and the diffusion rate?