Q: An organism's traits are largely determined by the genetic makeup of its parents. A mutation in which kinds of cells in a parent could cause a new trait to appear in the parent's offspring?

OPTIONS:
- sperm or egg
- egg or nerve
- nerve or muscle
- muscle or sperm
A: sperm or egg
Q: Onions can reproduce from bulbs. One parent bulb generates daughter bulbs with duplicate genetic information. Which is the most likely advantage of this kind of reproduction?

OPTIONS:
- Population size remains constant.
- Beneficial mutations are inevitable.
- Genetic variation is maximized.
- Large quantities of individuals can be produced rapidly.
A: Large quantities of individuals can be produced rapidly.
Q: A student conducts an experiment using a common but potentially harmful bacteria culture. After working with the bacteria, which is the most important safety practice to follow?

OPTIONS:
- turn off any electrical equipment
- dispose of waste materials
- wash hands and tabletops thoroughly
- return materials to their proper place
A: wash hands and tabletops thoroughly
Q: Michelle is interested in improving the quality of the soil in her yard. She wants more water and air to penetrate the soil. What should she add to the soil to help her achieve this goal?

OPTIONS:
- bacteria
- fertilizers
- pesticides
- earthworms
A:
earthworms