How many pairs of chromosomes does a genetically-normal human being have?

A) 23

B) 36

C) 46

D) 48

Which microscope would be most useful for quickly estimating the number of red blood cells in a patients blood sample

The work of which scientist was largely ignored during his lifetime?

Cyanide is an especially powerful natural poison derived from a chemical found in wild almonds. Even small does have been shown to be extremely lethal to animal cells, and a hand full of wild almonds contains enough cyanide to kill an adult human.

Which of the following genotypes indicates a homozygous dominant trait? a. Tt b. TT c. tt

Taenia saginata/Taenia solium are commonly known as tapeworms. true or false

What symbol indicates the cardinal directions

Within each eon, identify major events and the types of life that dominated the Earth during the time.

Which product of combustion contributes most to the greenhouse effect?

Why can't astronomers measure the parallax of a star that is a million light years away?

An advantage of using an electromagnet, instead of a regular magnet to move cars in a junk yard is then an electromagnet can easily be turned on and off. True or False.