What is the main factor that prevents the growth of tropical plants in the norther part of the united states?

The body is protected against harmful flu viruses by

Monitor and apply fix up strategies

Question 3(multiple choice worth 4 points) (02.04 lc) which best describes the function of chloroplast? allows certa molecules to enter and exit the cell makes food during photosynthesis detoxifies waste products o packages proteins into vesicles