Dna replication results in two dna molecules, a)each with one new strand and one original strand. b) one with two new strands and the other with two original strands. c) each with two original strands. d) each with two new strands.

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important

Agroup of plant cells was exposed to radiation, which damaged the chloroplasts and caused them to lose function. if the mitochondria were unharmed, what would happen to the overall function of the plant cells? a. the cells would not be able to make food, but would be able to release energy from biomolecules. b. the cells would not be able to replicate dna, but would be able to break down waste. c. the cells would not be able to break down waste, but would be able to replicate dna. d. the cells would not be able to release energy from biomolecules, but would be able to make food.

Match each description of an object’s motion with the position-time graph that represents it. not moving moving with constant speed speeding up slowing down