Which example represents an abiotic factor in an aquatic ecosystem? Choose the correct answer.

A. Water lilies float on top of a pond.

B. A population of bass lives in a lake.

C. The pH of a lake is decreased by acid rain.

D. Dragonflies feed on small insects near a pond.

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.

Abnormal softening of a gland is known as

In the diagram below, the northern hemisphere would be in what season at position a a. fall b. winter c. summer d. spring