All Tubes incubated for 20 seconds and are filled with 4mL of H202 and TUBE 1: 1mL of catalase TUBE 2: 2mL of catalase TUBE 3: 3mL of H20 (water) TUBE 4: 4mL of sucrase Which tube serves as the control?​

They said i have got a sign of tuberculosis what should i do

Suppose you are estimating the size of a blue crab population. what is the population size if the number marked in the first catch is 40, the total number in the second catch is 200, and the number marked in the second catch is 50?

~~16. while watching a special on animals, brianna discovers that hares tend to lose heat through their ears. based on this and what is known about surface-to-volume ratios, propose an explanation as to why hares that live in hot climates (such as the desert) have large, extended ears