Fact 1: Bottleneck effect occurs when a population suddenly gets much smaller. Fact 2: Population growth is reduced by external migration. Given the two facts above, bottleneck effect can occur with ?

OPTIONS:
- external migration
- direct damage to the lungs
- Movement of an air mass
- competition
- if humans disturb bears
- competing for resources
- Plant growth is reduced
- Temperature changing

Answer: external migration

Problem: OPTIONS:
- sub-units of species
- single-celled organisms
- diet of species
- most organisms
- color of species
- ancestors of species
- Abnormal cell growth
- Males and females
Q: Fact 1: Harming an animal species has a negative impact on the population size of that species. Fact 2: Populations are the sub-units of species. Given the two facts above, harming an animal species has a negative impact on the what?
Answer: sub-units of species

Problem:OPTIONS:
- a fish
- mammals
- Lizards
- crocodiles
- Squids
- fur seals
- Bees
- Flowers

Fact 1: Vertebrate chordates have a backbone. Fact 2: Yep, lizards are chordates, just like humans. Given the two facts above, what has a backbone like a human?
****
A: Lizards

Fact 1: Ameasuring cup is used for measuring the volume of substances. Fact 2: Volume is the amount of space an object or substance takes up. Given the two facts above, what measures the amount of space a substance takes up?
OPTIONS:
- hydrogen and oxygen
- objects that have mass
- Veins and arteries.
- sweating
- evaporation
- A measuring cup
- heat energy
- an electron microscope
A measuring cup

Fact 1: Thirst is used to make an animal realize that it needs to replenish its bodily water by the body. Fact 2: Every plant and animal needs water to survive. Given the two facts above, what helps animals to survive?
OPTIONS:
- trees
- food
- warmth
- fur
- steam
- thirst
- friendship
- dreams

Answer: thirst

input with options: Fact 1: Bone provides protection for soft tissues and internal organs. Fact 2: Antlers are true bones and are composed of calcium and phosphorous. Given the two facts above, what provides protection for soft tissues and internal organs?
OPTIONS:
- bacteria
- Veins and arteries.
- Fully cooking the oysters
- layers of fat
- calcium and phosphorous
- water
- peachleaf willow
- the trachea
output:
calcium and phosphorous