Which molecule brings amino acids to the ribosomes to be assembled into proteins?

In addition to seeds, which of the following characteristics are unique to the seed-producing plants? a) sporopollenin b) lignin present in cell walls c) pollen d) use of air currents as a dispersal agent e) megaphylls

Which are reasons cells undergo cell division?

How do all types of diffusion/passive transport actually ‘work’ without using even the smallest amount of cellular energy?