Sonja and Jeremy performed several experiments to show the effect that changes in temperature had on the volume of an inflated balloon. They made sure the pressure stayed the same. They also showed the effects of pressure on volume if temperature stayed the same. They organized their information in this table. Experiment Volume Pressure Temperature
A Increases Stays the same Increases
B Decreases Stays the same Decreases
C Increases Decreases Stays the same
D Decreases Increases Stays the same

Which of the following statements correctly describes the set of experiments?
A. Experiments A and C have the same independent variable.
B. Experiments A and D have the same independent variable.
C. All experiments have the same controlled variable.
D. All experiments have the same dependent variable.

Salmonella typhimurium is a food-borne bacterial pathogen that can cause severe gastrointestinal disease. salmonella is often phagocytosed by macrophages that normally destroy bacterial pathogens, but this bacterium is somehow able to prevent the complete maturation of phagolysosomes. salmonella is able to tolerate the low ph of phagolysosomes, and in fact responds to the drop in ph by secreting toxins that interfere with other cellular responses. which of the following differences would you expect to contribute to the survival of a bacterium within an salmonella-containing phagosome, compared to a healthy phagolysosome? decreased activity of acid hydrolases increased activity of acid hydrolases decreased import of h+ ions increased import of h+ ions my guess is decreased activity of acid hydrolases but i'm not sure.

The following image is of a diatom. it lives in water and gets food from photosynthesis. it is encased in a hard shell made of something similar to glass or sand . a diatom is a(n) because it has a) multi-celled organism; specialized parts. b) vertebrate; a skeleton. c) insect; an exoskeleton. d) single-called organism; only one cell.

How does the study of genetic disorders such as pku biologists understand normal alleles?