What is the term used to describe when the population growth is at a level that can't sustain any more growth because there are not enough resources to sustain life on earth?

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 of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion

Explain how light energy is turned into chemical energy? ! due tomorrow!