Why does it take a long time to develop a new variety of tomato?
a. changes in traits happen gradually, over many generations.
b. tomatoes cannot acquire new traits.
c. a species cannot change over time.
d. many plants resist change.

Food contains a sugar called ( ), which is broken down in a process called cellular ( ). this process uses ( ) to break down food molecules and provide energy for cells. fill in the parentheses

Temperatures in ponds and lakes vary by season. select the best answer from the choices provided t f

What would most likely happen if green plants were exposed to longer days of sunlight? a. the mitochondria would produce less energy . b. the chloroplasts would produce more energy. c. the cell wall would become thicker. d. the vacuoles would quickly shrink.b. the chloroplasts would produce more energy.