Which of the following is true of reproduction in a pine tree? a. the zygote grows into an embryo. b. the pollen tube contains two diploid sperm. c. both sperm fertilize the egg. d. the cones are diploid.

I’m doing some practice exam questions for biology, and i’m not sure how to do these 3 parts to the question.

Which of the following is a good strategy when it comes to desserts

What are the two causes of density in deep current waters? a. salinity (how much salt) of the water and high temperaturesb. salinity (how much salt) of the water and low temperatures c. oxygen content of the water and high temperatures. d. oxygen content of the water and low temperatures