Organisms must have variation within a population in order for natural selection to occur. Which situation is an example of this variation?

1. A frog living in a pond is eaten by a predator, while others in the same population survive.

2. A snake living in a desert produces more offspring than other snakes in the same population.

3. Some rabbits living in a forest have short, spotted ears, while others have long white ears.

4. Some birds living in a grassland eat less than other birds who eat the same food.

During sunny hours, a large amount of build up between the hours of 1: 00-5: 00 pm. a. ozone b. mercury c. lead d. sulfuric acid

Acar company is testing seatbelts using crash test dummies. the company finds that when cars come to a sudden stop, the crash test dummies' bodies continue to move forward. the seat belt keeps the crash test dummies from hitting the back of the seat in front of them. why do the crash test dummies' bodies continue to move forward even though the car stopped? a. the friction opposing their bodies' movement keeps them in motion. b. the inertia of their bodies keeps them in motion. c. the forward acceleration of the car keeps them in motion. d. the gravity pulling on the car keeps them in motion.

In pea plants, the allele for inflated pod seed, i, is dominant over the allele for constricted pod seed, i. the punnett square shows a cross for this trait. which offspring will be homozygous dominant