Q: Q: Which muscular organ pumps blood all around your body? A:

OPTIONS:
- stomach
- lungs
- pancreas
- heart

A: heart

Q: Q: The values of which factors are controlled by the experimenter over the course of an experiment? A:

OPTIONS:
- other variables
- independent elements
- independent approaches
- independent variables

A: independent variables

Q: Q: What members of an ecosystem food chain take in food by eating producers or other living things? A:

OPTIONS:
- primary producers
- decomposers
- insectivores
- consumers

A: consumers

Q: Q: What bonds form because they give atoms a more stable arrangement of electrons? A:

OPTIONS:
- Hydrogen bond
- Ionic bond
- Polar bond
- covalent

A:
covalent