BSCS Sem 1 Rvw Game: Question Preview (ID: 3075)


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Biologists group living things into how many domains?
a) 2 b) 3 c) 4 d) 5
Researchers testing new drugs usually give the drug to one group of people and give placebos,
a) constitutes the experimental group. b) is needed so that the test will be repeated enough times. c) is the control group. d) is the experimental variable.
A DNA molecule is a polymer made of subunits (monomers) called
a) bases b) nucleotides c) nucleic acids d) amino acids
The information carried by a DNA molecule is in
a) its amino acid sequence. b) the total number of nucleotides it contains. c) the order of bases (As, Ts, Cs and Gs) in the molecule. d) the sugars and phosphates forming its backbone.
A gene is
a) the same thing as a chromosome. b) a sequence of bases that determine the traits of an organism. c) made of protein. d) made by a ribosome.
Organisms that possess homologous structures probably
a) are headed for extinction. b) by chance had similar mutations in the past. c) by chance had similar mutations in the past. d) evolved from the same ancestor.
We know a lot about fossil crabs, snails and corals, but not much about ancient seaweeds. Why do you suppose this is the case?
a) There were no seaweeds in ancient oceans. b) A mass extinction wiped out the seaweeds, but animals survived. c) Animal life was much more abundant than seaweeds in ancient times. d) Seaweeds were too soft to fossilize well.
The fossil record of horses reveal that
a) complex structures often evolve step-by-step. b) horses all evolved from different ancestors. c) horses have not changed since they were created. d) all species horses were created at the same time.
The oldest fossils usually
a) contain more radioactive isotopes than younger fossils. b) are found in the deepest strata. c) are found above younger fossils. d) have the longest half-lives.
Fossils of an ancient reptile called Lystrosaurus have been found in Africa, India and Antarctica. Which of the following best explains this distribution?
a) They were able to move between continents before the oceans filled. b) Movement of India due to continental drift carried them from place to place. c) They were once next to each other and since drifted apart. d) They were able to migrate over frozen seas during the Ice Ages.
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