Problem:OPTIONS:
- The size of the individuals
- global ecosystems
- The food of the species
- most organisms
- The number of individuals
- living things
- The color of the species
- Abnormal cell growth

Fact 1: Harming an animal species has a negative impact on the population size of that species. Fact 2: Population Population A population is comprised of the individuals of a species within an area. Given the two facts above, harming an animal species has a negative impact on what?
****
A: The number of individuals

Problem:OPTIONS:
- waves
- wind
- burning
- engines
- Fuel cells
- sweating
- Electrical
- energy

Fact 1: Coal is used for generating heat by burning. Fact 2: Coal arrives at the power station coal handling area. Given the two facts above, generating heat by what occurs at power stations?
****
A: burning

Problem:OPTIONS:
- Organic compounds
- food and shelter
- heat energy
- Chemical energy
- Chlorophyll
- members of their own species
- scarce resources
- inorganic molecules

Fact 1: Producers make food from inorganic molecules. Fact 2: Primary producers make up the lowest trophic level. Given the two facts above, what do organisms in the lowest trophic level use as food?
****
A: inorganic molecules

Problem:OPTIONS:
- arthropods
- aerobic capacity
- annelids
- protozoa
- Veins and arteries.
- backbone and jaw
- sensory neurons
- four limbs

Fact 1: Vertebrate chordates have a backbone. Fact 2: Jaws appear within the vertebrates. Given the two facts above, what characteristics do chordates have? ?
****
A:
backbone and jaw