Fact 1: Mammals can also generate little bursts of heat by shivering. Fact 2: Shivering causes muscle contractions to warm the body. Given the two facts above, mammals can also generate little bursts of heat by?

OPTIONS:
- muscle contractions
- circulation
- exhalation
- Temperature changing
- Movement of an air mass
- flow of electrons
- vibrations
- with their fur

Answer: muscle contractions

Fact 1: Genes that are located on the same chromosome are called linked genes. Fact 2: Linked genes are inherited together. Given the two facts above, genes are inherited together if they are located on the same what?

OPTIONS:
- the eyes
- chromosome
- cell
- gene
- pollen
- sensory neurons
- DNA
- Most plants

Answer: chromosome

Fact 1: Abalance is used for measuring mass of an object. Fact 2: Mass The base unit of mass is the gram. Given the two facts above, what instrument measures in grams?

OPTIONS:
- sweating
- A balance
- heat energy
- A ruler
- nutrients
- An anemometer
- energy
- A thermometer

Answer: A balance

Fact 1: Echinoderms lack respiratory and excretory systems. Fact 2: Echinoderms are represented by the starfish. Given the two facts above, _ lack respiratory and excretory systems.?

OPTIONS:
- graptolites
- insects
- ferns
- barnacles
- fossil fuels
- Allergies
- starfish
- parasites

Answer:
starfish