input: OPTIONS:
- universes
- HIV
- long
- extinct organisms
- dead things
- time
- H 2 O
- years Now, answer this question: Fact 1: Evolution is a change in the characteristics of living things over time. Fact 2: Almost all physical characteristics are genetic traits, inherited from parents. Given the two facts above, evolution is a change in the genetic traits of living things over what?
A:
output: time

Fact 1: Rivers are usually larger than streams. Fact 2: Estuaries are where the river meets the ocean. Given the two facts above, estuaries are always larger than which of the following?

OPTIONS:
- oceans
- streams.
- lakes
- Length
- kalenchoes
- body water
- bacteria
- planets

Answer: streams.

Problem: OPTIONS:
- light
- Chemical energy
- Decibels
- pheremones
- writing
- Energy
- heat produced
- language
Q: Fact 1: Echinoderms use pheromones to communicate with each other. Fact 2: Another group of echinoderms are the echinoids. Given the two facts above, what do echinoids use to communicate?
Answer: pheremones

Problem:OPTIONS:
- By wind and rain
- The flowers are pollinated
- photosynthesis.
- Transfers energy
- To conserve energy
- alter their physical structure
- thermal insulators
- hydrate their cells

Fact 1: Plants that are adapted to very dry environments are called xerophytes. Fact 2: Plants that have adapted by altering their physical structure are called xerophytes . Given the two facts above, what do Xerophytes do to adapt to dry environments?
****
A: alter their physical structure

Fact 1: Microscope is used to see small things by biologists by making them appear bigger. Fact 2: Bioaerosols are extremely small living organisms or fragments of living things suspended in the air. Given the two facts above, what do biologists use a microscope to see by making them appear bigger?
OPTIONS:
- sea urchins
- squids
- Jellyfish
- bioaerosols
- tunicates
- most cephalopods
- mussels
- tiny polyps
bioaerosols

Fact 1: Harming an animal species causes that animal 's population to decrease. Fact 2: Wild animal populations have decreased drastically, due to both hunting and loss of habitat. Given the two facts above, what will cause a creatures population to decrease?
OPTIONS:
- parasites
- wildlife preserves
- tapeworms
- habitat movement
- relocation
- hunting
- flooding
- Pesticides

Answer:
hunting