An organism must have a in order to be considered living.

a. brain

b. metabolism

c. nervous system

d. stimulus

Based on the data in your tables, did the light-colored moths have a higher or lower survival rate after the industrial revolution?

Which of these is an example of land degradation? a. containers designed to store pollutants leak. b. fertilizers provide too many nutrients to crops. c. garbage is buried so the land can be reclaimed later. d. a drought kills all the plants in an area, leaving bare land

The table above shows five different types of chromosomal abnormalities that can occur during meiosis. they result in either an individual having too many or too few chromosomes in their genome. what is the most likely cause of these chromosomal abnormalities?