A dependent variable is

a. directly changed by the experimenter.

b. manipulated by changes to the independent variable.

c. a variable that is kept constant.

d. a variable that is used as a control

Which animal is warm blooded? Polar bear Bird panda All of the above

Which of the following organisms is located only in the 3rd trophic level of the soil food web?

A single muscle cell is called: a. myofibril b. sarcomere c. muscle fiber d. myofilament

What does it mean if an experiment is replicable? Why is It important that experiments be replicable?

Why are high levels of genetic diversity (in a population) and species diversity (in an ecosystem) considered important environmental indicators and how are they beneficial?

What is the term for the flexible material that forms the structure of the ear? A. Cartilage B. Obliques C. Spongy tissue D. Osteoblast

Suppose you remove your test cultures from the incubator and notice that one of them-a known fermenter-has a gas bubble in the Durham tube. Knowing that fermenters frequently produce gas, you ignore the bubble and proceed to the next step.

In peas, yellow seed color (y) is dominant to green seed color (y). which describes an organism that has nonidentical alleles for seed color? yy and has green seeds yy and has yellow seeds yy and has yellow seeds yy and has green seeds

What would you expect to happen if sea otters were removed from this food web? Check all that apply. The population of elephant seals would decrease. The population of kelp crabs would increase. The population of kelp would increase.

When blockages in the bloodstream read the Brian it can cause blank?