Answer the following question given this paragraph: Q: What is the key to the demographic transition? A:

OPTIONS:
- higher birth rates
- higher expatriation
- higher death rates
- reduced family size

Answer: reduced family size

Problem: OPTIONS:
- lack of ogranic
- lack of a emerge
- lack of a cycle
- lack of a backbone
Q: Answer the following question given this paragraph: One trait the sponge and tarantula share is lack of a backbone. In fact, they don't have any bones at all. These are defining traits of all invertebrates. Some invertebrates have a skeleton, but it isn't made of bone. Many other traits of invertebrates show considerable diversity. Q: What is one trait that the sponge and tarantula share? A:
Answer: lack of a backbone

Problem:OPTIONS:
- steel
- zinc
- copper
- iron

Answer the following question given this paragraph: Refrigerator magnets stick to a refrigerator door because it contains iron. Why won't the magnets stick to wooden cabinet doors?. Q: What do refrigerator magnets contain that make them stick to a refrigerator door? A:
****
A: iron

Answer the following question given this paragraph: Earth's crust contains a lot of oxygen. The oxygen can combine with other elements to create oxide minerals. Oxides contain one or two metal elements combined with oxygen. Oxides are different from silicates, because they do not contain silicon. Many important metals are found as oxides. For example, hematite and magnetite are both oxides that contain iron. Hematite (Fe 2 O 3 ) has a ratio of two iron atoms to three oxygen atoms. Magnetite (Fe 3 O 4 ) has a ratio of three iron atoms to four oxygen atoms. Notice that the word "magnetite" contains the word "magnet. " Magnetite ( Figure below ) is a magnetic mineral. Q: What layer of earth contains abundant oxygen, which can combine with other elements to create oxide minerals? A:
OPTIONS:
- the core
- the surface
- the tectonic plates
- the crust
the crust

Answer the following question given this paragraph: Many flatworms are parasites with vertebrate hosts. Some are free-living carnivores that live mainly in aquatic habitats. Q: Some flatworms are free-living carnivores that live mainly in which type of habitats? A:
OPTIONS:
- Deciduous forest
- Desert
- freshwater
- aquatic

Answer: aquatic

input with options: Answer the following question given this paragraph: Q: What does the central cell develop into after double fertilization? A:
OPTIONS:
- endocell
- xygote
- exosperm
- endosperm
output:
endosperm