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Welcome to... A Game of X’s and O’s Another Presentation © 2000 - All rights Reserved [email protected] 1 2 4 7 3 5 8 6 9 Scoreboard 1 2 3 X 4 5 6 O 7 Click Here if X Wins Click Here if O Wins 8 9 1 Prokaryotes reproduce asexually by a process that begins with the replication of a prokaryote’s DNA. The cell membrane then pinches in two to form two daughter cells. What is the term describing this process? Meiosis, conjugation, recombination, or binary fission 1 Home Meiosis 2 Some prokaryotes and eukaryotes have whip-like projections that help propel the cell through liquid. What is the name of this whiplike projection? A cilium, a villus, a pilus, or a flagellum 2 Home flagellum 3 Which of the following organelles contains most of the cell’s DNA? Mitochondria, lysosome, nucleus, or ribosome 3 Home nucleus 4 Plant and animal cells are both eukaryotic, and thus they are similar in many ways. However, plant cells have some structures that are not present in animal cells. Which of the following structures are not found in animal cells? A. chloroplasts, large vacuole, and endoplasmic reticulum B. C. D. Cell wall, golgi complex, and ribosomes Cell wall, chloroplasts, and a large vacuole Chloroplasts, an endoplasmic reticulum and lysosomes 4 Home Cell wall, chloroplasts, and large vacuole 5 In living organisms, DNA consists of two complementary strands wound together in a specific structure called a? Beta sheet, double helix, spiral helix, or triple bond 5 Home Double helix 6 Charles Darwin observed the resemblance between organisms on the Galapagos Islands and those on the nearest coast. He hypothesized that the island organisms had evolved from the coastal organisms. What mechanism did Darwin propose caused evolution, punctuated equilibrium, genetic drift, natural selection, or gradualism 6 Home Natural selection 7 In 1986, hundreds of islands were created out of hilltops when Venezuela was flooded because of a closed dam. On all of these new islands, the top predators in the food chain, such as jaguars and eagles died out. What most likely happened to the herbivores and smaller carnivores in those local food chains after the predators disappeared? A. Their populations decreased B. C. Their diets changed They all developed new adaptations of defense. D. Their populations increased 7 Home Their populations increased 8 All plants and animals need energy in order to survive. The energy transfer system above shows how energy gets transferred among living things. If all of the worms were removed from the region, which species would have more energy available to it? Wasps, spiders, frogs, or grasshoppers 8 Home Grashoppers 9 Through the process of photosynthesis, algae convert sunlight into sugars. If you had to redraw this food chain to show one more level before the algae, what would be the best thing to draw? Sugar, plants, water, or the Sun 9 Home The sun