Answer the following question given this paragraph: Muscles cannot contract on their own. They need a stimulus from a nerve cell to "tell" them to contract. Let's say you decide to raise your hand in class. Your brain sends electrical messages to nerve cells, called motor neurons, in your arm and shoulder. The motor neurons, in turn, stimulate muscle fibers in your arm and shoulder to contract, causing your arm to rise. Involuntary contractions of cardiac and smooth muscles are also controlled by nerves. Q: What do muscles need to contract? A:

OPTIONS:
- stress
- tendons
- pressures
- stimulus

Answer: stimulus

Problem: OPTIONS:
- vibration
- tension
- rotation
- friction
Q: Answer the following question given this paragraph: Q: What force provides resistance whenever two surfaces are in contact? A:
Answer: friction

Problem:OPTIONS:
- content
- branch
- element
- domain

Answer the following question given this paragraph: The highest level, domain, is a relatively new addition to the system since the 1990s. Scientists now recognize three domains of life, the Eukarya, the Archaea, and the Bacteria. The domain Eukarya contains organisms that have cells with nuclei. It includes the kingdoms of fungi, plants, animals, and several kingdoms of protists. The Archaea, are single-celled organisms without nuclei and include many extremophiles that live in harsh environments like hot springs. The Bacteria are another quite different group of single-celled organisms without nuclei (Figure 1.10). Both the Archaea and the Bacteria are prokaryotes, an informal name for cells without nuclei. The recognition in the 1990s that certain "bacteria," now known as the Archaea, were as different genetically and biochemically from other bacterial cells as they were from eukaryotes, motivated the recommendation to divide life into three domains. This dramatic change in our knowledge of the tree of life demonstrates that classifications are not permanent and will change when new information becomes available. Q: What relatively new addition to and highest level of the system of taxonomic classification includes just three divisions, the eukarya, the archaea, and the bacteria? A:
****
A: domain

Answer the following question given this paragraph: The scientific classification of modern land plants is under constant revision. Informally, land plants can be classified into the groups listed in Table below . The most basic division is between nonvascular and vascular plants. Vascular plants are further divided into those that reproduce without seeds and those that reproduce with seeds. Seed plants, in turn, are divided into those that produce seeds in cones and those that produce seeds in the ovaries of flowers. You can read more about each of these groups of plants in the next lesson. Q: The most basic division of land plants is between what type of plants? A:
OPTIONS:
- perennial and annual
- deciduous and evergreen
- succulents and conifers
- nonvascular and vascular
nonvascular and vascular

Answer the following question given this paragraph: Other bacteria are parasitic and can cause illness. In parasitism , the bacteria benefit, and the other organism is harmed. Harmful bacteria will be discussed in another concept. Q: What would you call a relationship where the bacteria benefit and and the other organism is harmed? A:
OPTIONS:
- pathology
- fungi
- symbiotic
- parasitism

Answer: parasitism

input with options: Answer the following question given this paragraph: Electronic components are the parts used in electronic devices. They are made of p-type and n-type semiconductors. Examples of electronic components include diodes, transistors, and integrated circuits (microchips). Q: What are diodes, transistors, and integrated circuits examples of? A:
OPTIONS:
- computer parts
- radio parts
- machine parts
- electronic components
output:
electronic components