In the 19th century, what was known about atoms?
A. The exact structure of all atoms
B. The half-life of all atoms
C. The number of atoms that exist in the world is increasing
D. The atom determines the chemical properties of an element

Pixels are often referred to using dpi, or dots per inch. true\false

Why did mendel use pea plants in his experiments? a. they have no alleles. b. they are haploid organisms. c. they reproduce quickly. d. they are all male.

Group control group #1 experimental group yes yes yes control group #2 no new drug orange juice bed rest no yes no yes ves which of the following is the best explanation of why a second control group was included in this experiment? o a. to provide the volunteers in the study with something to drink o b. to prove that the common cold cannot be cured c. to confuse anyone who is trying to steal their new drug and sell it as their own invention o d. to researchers conclude that results are related to the new drug and not to the orange juice submit e previous