Question: How can new genetic variation occur in a population if there is no gene flow?
Answer Options: mutation interbreeding a diverse environment changing seasons Correct Answer: mutation
Question: Reproductive isolation is both a cause and a result of speciation. During the process by which one species becomes two, a very powerful form of reproductive isolation is geographic isolation. This is called _______ speciation.
Answer Options: allopatric sympatric sympathetic terrestrial Correct Answer: allopatric
Question: When populations are in the Hardy-Weinberg equilibrium, the allelic frequency is _______ from generation to generation.
Answer Options: stable changing accelerating in flux Correct Answer: stable
Question: There are several criteria that lead to natural selection. Select all the following that must be true to support natural selection in a population.
Answer Options: Genetic variation must exist in the population Mates are randomly selected More individuals are produced than can survive A characteristic that helps an organism survive is heritable Correct Answer: Genetic variation must exist in the population More individuals are produced than can survive A characteristic that helps an organism survive is heritable
Question: Reproductive isolation is both a cause and a result of speciation. During the process by which one species becomes two, a very powerful form of reproductive isolation is geographic isolation. This is called _______ speciation.
Answer Options: allopatric sympatric sympathetic terrestrial Correct Answer: allopatric
Question: The Hardy-Weinberg principle assumes conditions with:
Answer Options: no mutations no migration no natural selection random mating All of the above none of the above Correct Answer: All of the above
Question: The process of Natural Selection was proposed by ____________________.
Answer Options: Jean-Baptiste Lamarck Charles Lyell Charles Darwin James Hutton Correct Answer: Charles Darwin
Question: Which explains the need to get a flu vaccine every year? Why is one vaccine not effective for your entire life?
Answer Options: directional selection stabilizing selection diversifying selection mutation genetic drift all of the above none of the above Correct Answer: mutation
Question: Sometimes a species of plant becomes two species when the first species produces offspring with double the number of chromosomes. The two species continue to occupy the same habitat. This is an example of _______ speciation.
Answer Options: allopatric peripatric sympatric bipatric All of these are words that mean the same thing. None of these words describes this situation. Correct Answer: sympatric
Question: A normal, healthy digestive tract is free from bacteria.
Answer Options: NO, healthy bacteria colonize the digestive tract. YES, the bacteria in the digestive tract would cause disease. Correct Answer: NO, healthy bacteria colonize the digestive tract.
Question: Cyanobacteria
Answer Options: are eukaryotic cells. cause foodborne illness. cause intestinal illness. are photosynthetic bacteria. Correct Answer: are photosynthetic bacteria.
Question: Which of the following is INCORRECTLY paired?
Answer Options: spirillum – corkscrew bacillus – rod coccus – cone cell wall – peptidoglycan Correct Answer: coccus – cone
Question: Bacteria play a vital role in maintaining the cycle of life. Life on Earth could not long continue without them. Which of these is NOT an important contribution of bacteria?
Answer Options: Some fix nitrogen. They add CO₂ to the air. They recycle the chemicals from dead things. Bacteria do all these things. Bacteria do none of these things. Correct Answer: They add CO₂ to the air.
Question: Hans Christian Gram created the Gram Stain procedure which uses pink stains to identify bacteria based on the composition of the cell wall. Two exists in a thick layer for gram positive bacteria and cause the cells to stain peptidoglycan.
Correct Answer: Answer 1: Hans Christian Gram Answer 2: pink Answer 3: two Answer 4: peptidoglycan
Question: What is bio-magnification?
Answer Options: the accumulation and concentration of persistent toxic substances at higher levels of a food web the tendency of animals at higher levels of a food web to be larger and larger the need to use more powerful microscopes to look at animals and plants at lower levels of a food web the need to use longer and longer words to describe newer things scientists discover Correct Answer: the accumulation and concentration of persistent toxic substances at higher levels of a food web
Question: The steppes of Eurasia are an example of which terrestrial biome?
Answer Options: Tropical Wet Forest Savannas Subtropical Deserts Chaparral Temperate Grasslands Temperate Forests Boreal Forests Arctic Tundra Correct Answer: Temperate Grasslands
Question: The abyssal zone of the ocean has no ______.
Answer Options: plants life invertebrates fish Correct Answer: plants
Question: Water is a resource that humanity has gone to great lengths to obtain. We have tried to save rainwater, dug deep wells, diverted rivers, created lakes, built long aqueducts, and spent huge amounts of energy to desalinate sea water. In the process we have often ruined good cropland by making it too salty to grow crops. We have fought wars over water supply, and will do so again. What percentage of the Earth’s water is freshwater available from lakes and rivers?
Answer Options: 1% 5% 10% 25% Correct Answer: 1%
Question: The majority of water found on Earth is:
Answer Options: water vapor fresh water ice salt water Correct Answer: salt water