Which of the following does NOT help limit the population size of a species? a
Available food
b
Pollution
c
Amount of predators
d
All of these limit the population size of a species.

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

Inside a flashbulb, oxygen surrounds a thin coil of magnesium. when the flashbulb is set off, a chemical reaction takes place in which magnesium combines with oxygen to form magnesium oxide. which of the chemical equations matches the reaction above? a. mg + o2 mgo2 + energy b. 2mg + o mg2o + energy c. 2mg + o2 2mgo + energy d. mg + o mgo + energy

Ajet plane is speeding down the runway during takeoff. air resistance is not negligible. identify the forces on the jet.