What is a controlled experiment?
a. an experiment that has no responding variables
b. an experiment with a control group and an experimental group
c. an experiment with no dependent variables
d. an experiment that is performed inside

Which of the following is the most likely result of converting forestland to urban development? a. the amount of land available for lumber production decreases. b. fewer trees are needed because cities are made mainly of concrete. c. people discover more efficient ways to grow trees. d. the price of lumber goes down.

Which would prevent a plant from growing

Describe how alleles and genes are related