Omar wrote a hypothesis about batteries called dry cells.

if more dry cells are connected end to end, a light bulb will work longer because there is more energy available.

what are the variables in his hypothesis?

(a) the independent variable is the number of dry cells, and the dependent variable is the length of time the bulb works.

(b) the independent variable is the length of time the bulb works, and the dependent variable is the number of dry cells.

(c) the independent variable is the number of dry cells, and the dependent variable is the amount of energy available.

(d) the independent variable is the amount of energy available, and the dependent variable is the number of dry cells.

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.

Actinobacteria sp. are fermenting organisms (which do you use oxygen to breathe) referred to as chemoorganohetereotrophs this means they break down organic material and convert it to inorganic material. which part of the carbon cycle does this describe

What is used to keep track of the gamates and possible offsprings combination