1. homer wanted to see what kitchen cleaner worked best for cleaning his counters. he
used lysol, clorox, pinesol and just water. for each cleaner he put 5 milliliters of grape
juice on the counter, sprayed the cleaner and wiped it with a paper towel.
a. independent variable (iv):
b. dependent variable (dv):
c. control:

Consider darwin's first writings on the theory of natural selection. an important point of darwin's essay on the principle of population, written in 1798, was a peer's observation that in nature plants and animals produce far more offspring than can survive, this observation can be attributed to a) charles lyell. b) thomas malthus. c) jean-baptiste lamarck. d) johann friedrich meckel.

When is your respiration rate likely to change? a. when your intestines are digesting b. when your cells have too much glucose c. when your cells need more oxygen d. when your liver is working after a meal

The polio virus can cause skeletal muscle paralysis by destroying neuron cell bodies. what area of the spinal cord is destroyed