Answer the following question given this paragraph: Chordates are defined by a set of four characteristics that are shared by these animals at some point during their development. In some chordates, all four traits are present in the adult animal and serve important functions. However, in many chordates, including humans, some traits are present only during the embryonic stage. After that, these traits may disappear. Q: Chordates are defined by a set of four characteristics that are shared by these animals at some point during their? A:

OPTIONS:
- death
- response
- birth
- development

Answer: development

Problem: OPTIONS:
- egg
- dna
- meristematic
- sperm
Q: Answer the following question given this paragraph: Sperm are tiny cells. In fact, they are the smallest of all human cells. They have a structure that suits them well to perform their function. Q: What type of cells are the smallest of all human cells? A:
Answer: sperm

Problem:OPTIONS:
- meiosis
- infection
- accumulation
- mutation

Answer the following question given this paragraph: At some time in the past, a variation probably came from a mutation. A mutation is a random change in an organism's genes ( Figure below ). Mutations are natural. Some are harmful, but many are neutral. If a mutation is harmful, the organism may not live to reproduce. If the mutation is beneficial, that organism may have a better chance to survive. An organism that survives is likely to have offspring. If it does, it may pass the mutation on to its offspring. The offspring may be more likely to survive. Q: What is a random change in an organism's genes? A:
****
A: mutation

Answer the following question given this paragraph: Only the top 200 meters or so of water receive enough sunlight for photosynthesis. This part of the water is called the photic zone. Below 200 meters, there is too little sunlight for photosynthesis to take place. This part of the water is called the aphotic zone. In this zone, food must come from other sources. It may be made by chemosynthesis, in which microorganisms use energy in chemicals instead of sunlight to make food. Or, food may drift down from the water above. Q: What is the top part of water able to receive enough sunlight for photosynthesis called? A:
OPTIONS:
- thymic zone
- synthesis zone
- fantasmic zone
- photic zone
photic zone

Answer the following question given this paragraph: Light microscopes continued to improve and are still used today. However, to see extremely small objects, a different type of microscope, such as an electron microscope, must be used. Q: What type of microscope is used to see extremely small objects? A:
OPTIONS:
- optical microscope
- X-ray microscope
- ultrasonic microscope
- electron microscope

Answer: electron microscope

input with options: Answer the following question given this paragraph: Non-polar molecules are usually insoluble in water. Q: What molecules are usually insoluble in water? A:
OPTIONS:
- polar
- acids
- ions
- non-polar
output:
non-polar