Problem: OPTIONS:
- nervous system
- lung
- heart
- brain
Q: Answer the following question given this paragraph: part of a vertebrate endoskeleton that encloses and protects the brain; also called the skull. Q: The skull is a part of a vertebrate endoskeleton that encloses and protects what organ? A:
Answer: brain

Problem:OPTIONS:
- lungs
- layers
- pores
- gills

Answer the following question given this paragraph: Fish have gills that allow them to "breathe" oxygen in water. Water enters the mouth, passes over the gills, and exits the body through a special opening. Gills absorb oxygen from the water as it passes over them. Q: What do fish have that allow them to "breathe" oxygen in water? A:
****
A: gills

Answer the following question given this paragraph: Q: What makes a complete orbit around the earth once every 29 1/2 days? A:
OPTIONS:
- Mars
- the Sun
- Gemini
- the moon
the moon

Answer the following question given this paragraph: Types of Root Systems Root systems are mainly of two types (Figure 30.15). Dicots have a tap root system, while monocots have a fibrous root system. A tap root system has a main root that grows down vertically, and from which many smaller lateral roots arise. Dandelions are a good example; their tap roots usually break off when trying to pull these weeds, and they can regrow another shoot from the remaining root). A tap root system penetrates deep into the soil. In contrast, a fibrous root system is located closer to the soil surface, and forms a dense network of roots that also helps prevent soil erosion (lawn grasses are a good example, as are wheat, rice, and corn). Some plants have a combination of tap roots and fibrous roots. Plants that grow in dry areas often have deep root systems, whereas plants growing in areas with abundant water are likely to have shallower root systems. Q: Root systems are mainly of two types. dicots have a tap root system, while monocots have a what? A:
OPTIONS:
- long root system
- runner root system
- attaching root system
- fibrous root system

Answer: fibrous root system

Question: Answer the following question given this paragraph: Figure 29.17 shows a comet with two prominent tails. What most people do not know about the tails is that they always point away from the Sun rather than trailing behind the comet (like the tail of Bo Peep's sheep). Comet tails are composed of gases and dust evaporated from the body of the comet and ionized gas. The dust particles recoil away from the Sun when photons scatter from them. Evidently, photons carry momentum in the direction of their motion (away from the Sun), and some of this momentum is transferred to dust particles in collisions. Gas atoms and molecules in the blue tail are most affected by other particles of radiation, such as protons and electrons emanating from the Sun, rather than by the momentum of photons. Q: Why do comet tails always point away from the sun instead of trailing behind the comet? A:
OPTIONS:
- dust particles attract
- dust particles evaporate
- dust particles liquify
- dust particles recoil
Answer: dust particles recoil

input: OPTIONS:
- velocity
- temperature
- color
- mass Now, answer this question: Answer the following question given this paragraph: that the weak interaction could change quark flavor. It should also change neutrino flavorthat is, any type of neutrino could change spontaneously into any other, a process called neutrino oscillations. However, this can occur only if neutrinos have a mass. Why? Crudely, because if neutrinos are massless, they must travel at the speed of light and time will not pass for them, so that they cannot change without an interaction. In 1999, results began to be published containing convincing evidence that neutrino oscillations do occur. Using the Super-Kamiokande detector in Japan, the oscillations have been observed and are being verified and further explored at present at the same facility and others. Neutrino oscillations may also explain the low number of observed solar neutrinos. Detectors for observing solar neutrinos are specifically designed to detect electron neutrinos e produced in huge numbers by fusion in the Sun. A large fraction of electron neutrinos. Q: A spontaneous change process called neutrino oscillations can occur only if neutrinos have what property? A:
A:
output:
mass