Gene flow does not promote speciation, whereas season of fertility, natural selection, and genetic drift do.
The correct option is 3.
Enzymes are biological catalysts which speed up the rate of biochemical reactions inside the cells. Enzymes are very specific in action and they require specific conditions called optimum conditions for them to function optimally.
When the optimum conditions are not met, an enzyme's activity will be lowered or totally stopped.
Conditions that affect the optimum activity of an enzyme include: temperature, pH level and regulatory activity of regulatory enzymes and hormones.
Answer:
D fleas affect all animals
Clouds and Strom
The troposphere is the most minimal layer of Earth's environment that is closest to humans , and is likewise where almost all climate conditions happen. It contains roughly 75% of the climate's mass and 99% of the aggregate mass of water vapor and pressurized weather elements occur