Answer the following question given this paragraph: After Einstein proposed his theory, evidence was discovered to support it. For example, scientists shone laser light through two slits in a barrier made of a material that blocked light. You can see the setup of this type of experiment in the Figure below . Using a special camera that was very sensitive to light, they took photos of the light that passed through the slits. The photos revealed tiny pinpoints of light passing through the double slits. This seemed to show that light consists of particles. However, if the camera was exposed to the light for a long time, the pinpoints accumulated in bands that resembled interfering waves. Therefore, the experiment showed that light seems to consist of particles that act like waves. Q: According to one of einstein's theory, while light consists of particles, it behaves like this. A:
OPTIONS:
- thermodynamics
- tides
- molecules
- waves
waves
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Answer the following question given this paragraph: Molecules move from an area of high concentration to an area of lower concentration until an equilibrium is met. The molecules continue to cross the membrane at equilibrium, but at equal rates in both directions. Q: What protects reptiles from injury and loss of water? A:
OPTIONS:
- hairs
- pores
- tail
- scales
scales
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Answer the following question given this paragraph: Eukaryotes evolved about 2 billion years ago. Unlike prokaryotes, eukaryotes have a cell nucleus. They have more structures and are better organized. Organelles within a eukaryote can perform certain functions. Some supply energy; some break down wastes. Eukaryotes were better able to live and so became the dominant life form. You can see an example of a eukaryotic cell below ( Figure below ). Q: Unlike prokaryotes, eukaryotes have a what? A:
OPTIONS:
- flagellum
- cell wall
- mitochondria
- cell nucleus
cell nucleus
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Answer the following question given this paragraph: (left) The DNA double helix wraps around proteins (2) and tightly coils a number of times to form a chromosome (5). This figure shows the complexity of the coiling process. The red dot shows the location of the centromere, where the microtubules attach during mitosis and meiosis. (right) A representation of a condensed eukaryotic chromosome, as seen after the DNA has been copied. The chromosome is made of two identical, or sister, chromatids held together by a centromere. Q: What genetic unit is formed when the dna double helix wraps around proteins and tightly coils a number of times? A:
OPTIONS:
- atom
- gene
- neutron
- chromosome
chromosome
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