Jimmy is running laps during his physical education class. As he is running, he starts to breathe harder as
his body tries to get more oxygen. Which of the following best explains why Jimmy's oxygen requirement
increases?
A. His cells use oxygen as their primary source of energy.
B. His cells need oxygen to help break down sugars for energy.
C. His cells need oxygen to increase the levels of sugars in the blood.
D. His cells use oxygen to transport substances across their cell membranes.

Which kind of aquatic ecosystem does the photograph most likely show? a. marsh b. swamp c. lake d. river

~fourth largest plate ~includes parts of the indian and atlantic oceans ~subducts below the eurasian plate on the west side ~ the arabian and somali plates form boundaries with it what is the name of the tectonic plate described above? a) african plate b) eurasian plate c) north american plate d) indo- australian plate

Scenario #2 in 2001, a population of 2,500 poison dart frogs lived in the amazon rain forest. due to increased deforestation, the population dwindled to 25 frogs in 2019. new government regulations were enacted in 2022, successfully putting an end to the deforestation of the amazon rain forest. once deforestation was stopped, the poison dart frog population was able to recover. by 2050, the population reached 8,000 frogs, of that population, 20 are homozygous recessive for being spotted (ss genotype). q2- ? q- p- p2- 2pq-