Q: Fact 1: Population size influences the chances of a species surviving. Fact 2: All humans are the same species. Given the two facts above, what's survival is influenced by population size? | OPTIONS:
- chickens
- fur seals
- density
- gravity
- humans
- ducks
- animals
- clouds
A: humans

Q: Fact 1: Birds are endothermic tetrapod vertebrates. Fact 2: Birds and mammals are endothermic. Given the two facts above, what are endothermic? | OPTIONS:
- bacteria
- sharks
- dinosaurs
- organs
- brains
- animals
- crocodiles
- mammals
A: mammals

Q: Fact 1: Bivalves feed on plankton and nonliving organic matter. Fact 2: Scallops, oysters and clams are bivalves. Given the two facts above, what feeds on plankton and nonliving organic matter? | OPTIONS:
- sharks
- digestion
- h2o
- fungi
- clams
- humans
- animals
- gills
A: clams

Q: Fact 1: Aging is associated with the death of cells. Fact 2: If the waste accumulates, the cell ages and dies. Given the two facts above, what do dying cells do? | OPTIONS:
- Move to another area
- survival
- accumulate waste
- harm them
- kill them
- They may not survive.
- keeps the organism warm
- forest is destroyed
A: accumulate waste