*Question*
Q: When light passes from one medium to another, it changes what? Read this paragraph and choose the correct option from the provided answers: When light passes from one medium to another, it changes speed. For example, when light passes from air to glass, it slows down. If light strikes a sheet of glass at a 90 angle, or perpendicular to the glass, it slows down but still passes straight through the glass. However, if light enters the glass at an angle other than 90, the light bends as it slows down. The bending of light as it changes speed in a new medium is called refraction . The Figure below shows how refraction occurs. Notice that the speed of light changes again as it passes from the glass back to the air. In this case, the speed increases, and the ray of light resumes its initial direction. For a more detailed explanation of refraction, watch this video: http://www. youtube. com/watch?v=8RM46yvDOHI . Choices: - color - temperature - density - speed A:
**Answer**
speed

*Question*
Q: In prokaryotes, what is composed of a single, double-stranded dna molecule in the form of a loop or circle? Read this paragraph and choose the correct option from the provided answers: Genomic DNA Before discussing the steps a cell must undertake to replicate, a deeper understanding of the structure and function of a cell's genetic information is necessary. A cell's DNA, packaged as a double-stranded DNA molecule, is called its genome. In prokaryotes, the genome is composed of a single, double-stranded DNA molecule in the form of a loop or circle (Figure 10.2). The region in the cell containing this genetic material is called a nucleoid. Some prokaryotes also have smaller loops of DNA called plasmids that are not essential for normal growth. Bacteria can exchange these plasmids with other bacteria, sometimes receiving beneficial new genes that the recipient can add to their chromosomal DNA. Antibiotic resistance is one trait that often spreads through a bacterial colony through plasmid exchange. Choices: - allele - rNA - chromosomes - genome A:
**Answer**
genome

*Question*
Q: What is the name of the small bumps that contain taste buds and covers the tongue? Read this paragraph and choose the correct option from the provided answers: Figure 14.3 The Tongue The tongue is covered with small bumps, called papillae, which contain taste buds that are sensitive to chemicals in ingested food or drink. Different types of papillae are found in different regions of the tongue. The taste buds contain specialized gustatory receptor cells that respond to chemical stimuli dissolved in the saliva. These receptor cells activate sensory neurons that are part of the facial and glossopharyngeal nerves. LM 1600. (Micrograph provided by the Regents of University of Michigan Medical School ©️ 2012). Choices: - lingual tonsils - palatine tonsils - cuticle - papillae A:
**Answer**
papillae

*Question*
Q: What are structures that have a common function and suggest common ancestry? Read this paragraph and choose the correct option from the provided answers: Homologous structures are structures that have a common function and suggest common ancestry. For example, homologous structures include the limbs of mammals, such as bats, lions, whales, and humans, which all have a common ancestor. Different mammals may use their limbs for walking, running, swimming or flying. The method the mammal uses to move is considered a common function. Choices: - reversible structures - analogous structures - monogamous structures - homologous structures A:
**Answer**
homologous structures