Q: Which of the following describes a reason why companies irradiate some fruits and vegetables before they are sold to the public? OPTIONS:
- to improve the flavors by increasing the sugar content
- to speed up the ripening of produce picked too early
- to partially cook the produce before canning or freezing
- to extend the shelf life by killing existing microorganisms
A: to extend the shelf life by killing existing microorganisms

Genes are unable to determine a person's
OPTIONS:
- eye color.
- athletic ability.
- number of teeth.
- shape of earlobes.

athletic ability.

Q: What is the smallest particle of the element gold (Au) that can still be classified as gold? ---- OPTIONS:
- atom
- molecule
- neutron
- proton

A: atom

A scientist finds the bones of a dinosaur. What could help the scientist determine the approximate age of the dinosaur bones?
===
OPTIONS:
- the birds living in the area of the bones
- the weather conditions in the area of the bones
- the kinds of trees living in the area of the bones
- the index fossils in the area of the bones

the index fossils in the area of the bones

Question:
What atoms combine to make up a molecule of water? 1. 1 hydrogen, 1 oxygen 2.
OPTIONS:
- hydrogen,
- oxygen
- 2 hydrogen, 1 oxygen
- 2 hydrogen, 2 oxygen
Answer:
2 hydrogen, 1 oxygen

[Q]: Which of the following structures is not present in animal cells?
===
OPTIONS:
- cell membrane
- cell wall
- mitochondrion
- nucleus
****
[A]:
cell wall