Question: Answer the following question given this paragraph: Gases in the coma and tail of a comet reflect light from the Sun. Comets are very hard to see except when they have comas and tails. That is why they appear only when they are near the Sun. They disappear again as they move back to the outer solar system. Q: What parts of comets make them easy to see? A:
OPTIONS:
- arcs and tails
- novas and tails
- craters and tails
- comas and tails
Answer: comas and tails

input with options: Answer the following question given this paragraph: Note that Earth's axis of rotation is tilted. The axis is not perpendicular to the plane of the ecliptic. This plane is the one that solar system bodies are mostly lined up in. Q: What scale measures acidity? A:
OPTIONS:
- frequency scale
- richter scale
- salinity scale
- ph scale
output: ph scale

Q: Answer the following question given this paragraph: Almost all surfaces reflect some of the light that strikes them. The still water of the lake in Figure above reflects almost all of the light that strikes it. The reflected light forms an image of nearby objects. An image is a copy of an object that is formed by reflected or refracted light. Q: A visual "copy" of an object that is formed by reflected or refracted light is called what? A:

OPTIONS:
- mirror
- instance
- photo
- image

A: image

input: OPTIONS:
- diffraction
- metamorphism
- bifurcation
- superposition Now, answer this question: Answer the following question given this paragraph: Superposition refers to the position of rock layers and their relative ages. Relative age means age in comparison with other rocks, either younger or older. The relative ages of rocks are important for understanding Earth's history. New rock layers are always deposited on top of existing rock layers. Therefore, deeper layers must be older than layers closer to the surface. This is the law of superposition . You can see an example in Figure below . Q: What is the position of rock layers and the relative ages called? A:
A:
output: superposition

Answer the following question given this paragraph: For natural selection to take place, organisms must vary in their traits. Asexual reproduction results in offspring that are all the same. They are also identical to the parent cell. So how can prokaryotes increase genetic variation? They can exchange plasmids. This is called genetic transfer . It may happen by direct contact between cells. Or a "bridge" may form between cells. Genetic transfer mixes the genes of different cells. It creates new combinations of alleles. Q: What is the exchange of plasmids by prokaryotes called? A:

OPTIONS:
- biochemical transfer
- artificial transfer
- transcription
- genetic transfer

Answer: genetic transfer

Q: Answer the following question given this paragraph: Echinoderms are named for their "spiny skin. " However, the spines aren't on their skin. They are part of the endoskeleton. The endoskeleton consists of calcium carbonate plates and spines, covered by a thin layer of skin. Adult echinoderms have radial symmetry. This is easy to see in the sea star and sand dollar in Figure above . However, echinoderms evolved from an ancestor with bilateral symmetry. Evidence for this is the bilateral symmetry of their larvae. Q: What type of organism, including sea stars and sand dollars, is named for their spiny skin? A:

OPTIONS:
- mollusks
- diatoms
- chordates
- echinoderms

A:
echinoderms