You are planning an experiment to find out whether the rate at which water freezes depends on the shape of the container. What is the dependent variable?
A.) shape of the container
B.) rate at which water freezes
C.) amount of water
Ans: B.) rate at which water freezes
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The differences in inherited traits among individuals in a population are called _______
A. species variation B. genetic mutations C. genetic variation D. natural selection E. None of these
Enzymes
a. change the rate of a reaction. b. change the direction of a reaction. c. change the free energy of a reaction. d. are used up in a reaction. e. are present in concentrations approaching their substrates' concentrations.
Four of the five answers below are correct statements about gymnosperm reproduction. Select the exception
a. Pollen grains mature into mature male gametophytes. b. Sperm in gymnosperms are not flagellated. c. Sperm reach egg cells through a pollen tube. d. The zygote develops into a mature seed. e. Seed cones and pollen cones develop on separate trees.
What is the order of the layer of meninges from the innermost to the outermost?
a) Arachnoid mater, dura mater, pia mater b) Dura mater, arachnoid mater, pia mater c) Pia mater, dura mater, arachnoid mater d) Pia mater, arachnoid mater, dura mater