input: OPTIONS:
- hormone
- metabolite
- neurotransmitter
- catalyst Now, answer this question: Answer the following question given this paragraph: Like other catalysts, enzymes are not reactants in the reactions they control. They help the reactants interact but are not used up in the reactions. Instead, they may be used over and over again. Unlike other catalysts, enzymes are usually highly specific for particular chemical reactions. They generally catalyze only one or a few types of reactions. Q: Enzymes are a type of what, and as such, they are not reactants in the reactions they control? A:
A:
output: catalyst

Answer the following question given this paragraph: Q: In resting neurons, the plasma membrane has many open potassium channels but few open of which other channels? A:

OPTIONS:
- silicon
- oxygen
- sulfur
- sodium

Answer: sodium

Problem: OPTIONS:
- winds
- Oscillations
- Currents
- waves
Q: Answer the following question given this paragraph: Waves interact with matter in several ways. The interactions occur when waves pass from one medium to another. The types of interactions are reflection, refraction, and diffraction. Each type of interaction is described in detail below. You can see animations of the three types at this URL: http://www. acoustics. salford. ac. uk/schools/teacher/lesson3/flash/whiteboardcomplete. swf . Q: Reflection, refraction, and diffraction are examples of what type of interaction? A:
Answer: waves

Problem:OPTIONS:
- lack of ogranic
- lack of a emerge
- lack of a cycle
- lack of a backbone

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:
****
A: lack of a backbone

Answer the following question given this paragraph: Besides social insects, animals in many other species also cooperate. For example, in meerkat colonies, young female meerkats act as babysitters. They take care of the baby meerkats while their parents are out looking for food. Q: What do young female meerkats act as in colonies? A:
OPTIONS:
- predators
- defenders
- midwives
- babysitters
babysitters

Answer the following question given this paragraph: Lobe-fined fish are currently far fewer in number than ray-finned fish. Their fins, like the one shown in Figure above , contain a stump-like appendage of bone and muscle. There are two groups of lobe-finned fish still alive today: coelacanths and lungfish. Q: What are two types of lobe finned fish? A:
OPTIONS:
- sharks and piranha
- piranha and pike
- moles and lungfish
- coelacanths and lungfish

Answer:
coelacanths and lungfish