PLEASE HELP ME EMERGENCY PLEASE HELP Which of the below best describes the function of the respiratory system?

To circulate nutrients and gases throughout the body.

To bring oxygen into the body and to remove carbon dioxide from the body.

To break down food to glucose molecules that the cells can use.

(This is 7th grade science)

Turtle hatchling survivorship rate is low in many turtle species due to predation. amanda researched the predatory rate on a species of turtle eggs in the red river. the eggs were harvested from trapped turtles and the egg's cloaca film (reproductive discharge) was either washed off or left on once gathered. research suggests that predators use the female's cloaca scent to locate the eggs. the eggs were only handled when wearing gloves and then reburied along islands where the turtles were trapped. the nests were monitored by cameras and manually on foot and data on nest predation were recorded. a. based on the experimental design, what is the dependent variable? b. based on the experimental design, what is the independent variable? c. based on the experimental design, what is the control?

Compare and contrast region e in the illustration above with region d. describe the physical characteristics of each region.

How does an angiosperm prevent self pollination