N Quiz

1. The positively charged central portion of an atom that comprises nearly all of the atomic mass and that consists of protons and neutrons. 2. The portion of a eukaryotic cell that is surrounded by a nuclear membrane and contains DNA.

• nucleus
• neutrons
• nuclear reaction
• nutrient

A nutritive substance or ingredient.

• nucleus
• neutrons
• nuclear reaction
• nutrient

An uncharged elementary particle that has a mass nearly equal to that of the proton and is present in atomic nuclei.

• nucleus
• neutrons
• nuclear reaction
• nutrient

A change in the identity or characteristics of an atomic nucleus that results when it is bombarded with an energetic particle.

• nucleus
• neutrons
• nuclear reaction
• nutrient

The principle that in a given environment individuals having characteristics that aid survival will produce more offspring, and the proportion of individuals having such characteristics will increase with each succeeding generation.

• nucleus
• neutrons
• natural selection
• nutrient

Neither acidic nor basic (as in pH).

• natural
• nesting
• neutral
• neutrons

Existing in, or produced by nature.

• nuclear
• natural
• nutrient
• neutral

To build or occupy a nest; settle in.

• neutrons
• nutrient
• neutral
• nesting

Used in or produced by a nuclear reaction; referring to particles or properties of an atomic nucleus.

• nuclear
• natural
• nucleus
• neutral