Answer the following question given this paragraph: Q: Over many generations, the resulting genetic diversity provides valuable raw material for what? Choices: - coral selection - characteristic selection - intelligent selection - natural selection A:
natural selection
(Question)
Answer the following question given this paragraph: The echinoderm nervous system has a nerve ring at the center and five radial nerves extending outward along the arms. There is no centralized nervous control. Echinoderms have separate sexes and release their gametes into the water where fertilization takes place. Echinoderms may also reproduce asexually through regeneration from body parts. Q: What process takes place when echinoderms release their gametes into the water? Choices: - migration - stimulation - isolation - fertilization A:
(Answer)
fertilization
Ques: Answer the following question given this paragraph: In the 1920s, physicists discovered that electrons do not travel in fixed paths. In fact, they found that electrons only have a certain chance of being in any particular place. They could only describe where electrons are with mathematical formulas. That's because electrons have wave-like properties as well as properties of particles of matter. It is the "wave nature" of electrons that lets them exist only at certain distances from the nucleus. The negative electrons are attracted to the positive nucleus. However, because the electrons behave like waves, they bend around the nucleus instead of falling toward it. Electrons exist only where the wave is stable. These are the orbitals. They do not exist where the wave is not stable. These are the places between orbitals. Q: Electrons exist only where the wave is what? Choices: - seen - spinning - solid - stable A:
Ans: stable
(Q).
Answer the following question given this paragraph: The plot that we know of as a graph was the brainchild of the French mathematician-philosopher Rene Descartes (1596-1650). His studies in mathematics led him to develop what was known as "Cartesian geometry", including the idea of our current graphs. The coordinates are often referred to as Cartesian coordinates. Q: What do we call the mathematical field of study credited to french mathematician-philosopher rene descartes? Choices: - algebra - Euclidean geometry - calculus - cartesian geometry A:
(A).
cartesian geometry
Ques:Answer the following question given this paragraph: Even if Laura didn't try to stop the skateboard, it would stop sooner or later. That's because there's also friction between the wheels and the pavement. Friction is a force that counters all kinds of motion. It occurs whenever two surfaces come into contact. Q: What force occurs whenever two surfaces come into contact? Choices: - tension - vibration - gravity - friction A:

Ans:friction
Answer the following question given this paragraph: Terrestrial biomes include the tropical rainforest, chaparral, and taiga. Q: Tropical rainforest, chaparral, and taiga are what kind of biomes? Choices: - endangered - arboreal - freshwater - terrestrial A:
terrestrial