2. brittany wanted to find out which wheels were best for her skateboard. she purchased 4 sets of new

wheels of different brands. she and a friend set up a course on her driveway. brittany rode through

the course 5 times on each set of wheels. her friend timed her with a stopwatch and recorded the

times. they averaged the times for each brand of wheels.

a. independent variable

b. dependent variable -

c. experimental group -

d. control group -

e. constants -

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?

Plz fast biotechnology is a growing field of applied biology. many crops such as corn have been engineered to be resistant to herbicides. therefore farmers can spray these chemicals to kill weeds growing near the crop without worries of killing the crop itself how does this type of biotechnology work? a. by changing the genetic make up of the crops. b. by causing the crops to kill the weeds. c. by changing the type of crops used. d. by changing the location of the crops.

Human genes only differ by less than percent. a. 1 b. 6 c. 11 d. 16