Fact 1: Urine leaves the body through a sphincter in the process of urination. Fact 2: Muscles around the urethra, called sphincter muscles, control the flow of urine out of the body. Given the two facts above, what controls the urination process?

OPTIONS:
- microorganisms
- mechanical waves
- that material's properties
- the looseness of soil
- Muscles around the urethra
- Bones around the urethra
- The brain
- Muscles around the anus

Answer: Muscles around the urethra

Fact 1: Bivalves feed on plankton and nonliving organic matter. Fact 2: Clams and oysters are examples of bivalves. Given the two facts above, what do clams feed on?

OPTIONS:
- sand particles
- jellyfish
- Something made from fermented ricce
- plankton and nonliving organic
- minnows and other small fish
- Something that is secreted in a shallow cup.
- Something with a head, thorax, and abdomen
- sub-units of species

Answer: plankton and nonliving organic

Fact 1: Harming an animal species has a negative impact on the population size of that species. Fact 2: Population size has no bearing on that amount of genetic variation found within a population. Given the two facts above, harming an animal species has no bearing on the amount of genetic variation found within a what?

OPTIONS:
- egg
- amoebae
- A virus
- animal
- population
- person
- amphibians
- threatened

Answer: population

Fact 1: Harming an animal species has a negative impact on the population size of that species. Fact 2: Habitat loss and hunting are the two major causes for their declining populations. Given the two facts above, hunting can cause what to happen to an animal species?

OPTIONS:
- more habitat
- more storms
- die
- death
- harm
- loss
- more water availability
- Injury

Answer:
harm