How does a pine tree reproduce?
a. it produces stems. b. it produces roots. c. it produces leaves. d. it produces eggs and sperm.

How is an environment able to support different varieties of organisms?

Which of the following choices is not an effective solution to the energy waste related to inefficient lighting? a. using low-pressure sodium lighting sources b. pointing lights on billboards and street signs upward c. placing light sources on time controls d. shielding light to direct it downward

Plants that have reproductive structures called cones are?