Why are root tip cells better cells to study than the middle of the roots? a. cells stop growing at the root tips so you would see more cells dividing b. root tips are more colorful so you would see more cells dividing c. only the tips of the roots have a nucleus d. onion roots grow from the tip so you would see more cells dividing

The hypothesis of continental drift states that earth's continents, which are located on tectonic plates, move relative to each other. which of the following is true of the movement of the tectonic plates? a. tectonic plates only move once every million years. b. they move at a rate of approximately 5 centimeters per year. c. tectonic plates never move, only the continents located on them do. d. their movements are very rapid and occur at random times.

These are the components of the reservoirs of carbon that are exchanged in our environment.

Number and variety of living organisms; includes genetic, species, and ecological types.