Answer the following question given this paragraph: The smallest piece of an element that maintains the identity of that element is called an atom. Individual atoms are extremely small. It would take about fifty million atoms in a row to make a line that is 1 cm long. The period at the end of a printed sentence has several million atoms in it. Atoms are so small that it is difficult to believe that all matter is made from atomsbut it is. The concept that atoms play a fundamental role in chemistry is formalized by the modern atomic theory, first stated by John Dalton, an English scientist, in 1808. It consists of three parts: 1. Q: An atom is the smallest unit of what that maintains the identity of the latter? A:
OPTIONS:
- mixture
- organism
- cell
- element
element

Answer the following question given this paragraph: 24.1 The biological species concept emphasizes reproductive isolation. Q: What evolutionary concept emphasizes reproductive isolation? A:
OPTIONS:
- chemical species concept
- toxic species concept
- reproductive method concept
- biological species concept

Answer: biological species concept

Question: Answer the following question given this paragraph: The sugar glucose is a covalent compound. When sugar dissolves in water, it forms individual glucose molecules (C 6 H 12 O 6 ). You can see how this happens in the Figure below . Sugar is polar like water, so sugar molecules also have positive and negative ends. Forces of attraction between oppositely charged ends of water and sugar molecules pull individual sugar molecules away from the sugar crystal. Little by little, the sugar molecules are separated from the crystal and surrounded by water. You can watch this happening in the video at the following URL: http://www. youtube. com/watch?v=hydUVGUbyvU. Q: What is the chemical formula for a glucose molecule? A:
OPTIONS:
- a5 h12 o6
- H2 C3 NA6
- d5 h12 o6
- c6 h12 o6
Answer: c6 h12 o6

input with options: Answer the following question given this paragraph: Lakes, ponds, streams, springs, and wetlands are fresh water bodies. The organisms that live in them are part of freshwater ecosystems. These ecosystems vary by temperature, pressure (in lakes), and the amount of light that penetrates. The type of plants that grow in these ecosystems varies. Q: Lakes, ponds, streams, springs, and wetlands are? A:
OPTIONS:
- salt water bodies
- man-made structures
- land formations
- fresh water bodies
output: fresh water bodies

Q: Answer the following question given this paragraph: Since the mid 1800s, Earth has warmed up quickly. Look at Figure below . The 14 hottest years on record have all occurred since 1900. Eight of them have occurred since 1998! This is what is usually meant by global warming . Q: Eight of the hottest years on record have occurred since what year? A:

OPTIONS:
- 2002
- 1997
- 1991
- 1998

A: 1998

Answer the following question given this paragraph: Strong bases completely dissociate in water, releasing all hydroxide anions into the solution. The most common strong bases are soluble metal hydroxides. Weak bases partially deprotonate water to form small amounts of hydroxide and the protonated base. Q: What kind of bases completely dissociate in water, releasing all hydroxide anions into the solution? A:
OPTIONS:
- unusual
- weak
- whole
- strong
strong