Biology Questions

Variation of ecological habitats within a species is characteristic of which type of diversity? a. Genetic diversity b. Ecosystem diversity c. Species diversity d. Regional diversity.
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Researchers performing __________ insert a weak electric current into the brain to stimulate it. A. lesioning B. ESB C. EEG
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Doctors do not administer vaccinations to people who are too sick. Which best explains why? A. The weakened or dead form of the pathogen may not have any effect on sick people. B. The weakened or dead form of the pathogen may have a fatal effect when it is combined with medication that the sick people are taking. C. The digestive systems of sick people may be negatively affected by the weakened or dead pathogen. D. The white blood cells of sick people may not be able to efficiently handle the weakened or dead form of the pathogen.
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Barnacles and whales have a commensalistic relationship in which barnacles benefit. What would most likely happen to the whale population if the barnacle population decreased? become extinct decrease increase stay the same
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A normal appearing couple is found to be heterozygous recessive for albinism. Both have the genotype Aa. The gene responsible for albinism is recessive to the normal pigment-producing gene. What are the chances of their children being albino?
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Bacteria are very small single-celled organisms that lack a nucleus. Although bacterial cells are less complex than the cells that make up the human body, bacteria are very important to human health. Which statement BEST summarizes how bacteria affect human health?A)Bacteria cause disease in humans. B)Bacteria are beneficial to humans. C)Bacteria rarely affect human cells because they are so much smaller. EliminateD)Some bacteria are beneficial to humans and some bacteria are harmful.
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Which part of the atom is directly involved in chemical changes? A. the electron B. the energy levels C. the nucleus D. the charges
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Which statement describes how work and power are similar? (2 points) You must know force and distance to calculate both. You must know energy and force to calculate both. You must know velocity and time to calculate both. You must know time and energy to calculate both.
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Work and power are different because (2 points) work involves force and distance while power involves force and velocity. work involves distance and mass while power involves distance and time. work involves energy and time while power involves force and mass. work involves velocity and time while power involves energy and force.
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Which of the following will occasionally produced a duplicate gene
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What is the name of the process in which an organism makes a new organism? A.mutationB.fertilizationC.variationD.reproduction
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When researchers use a molecular clock what are they measuring?
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The moon outside is very large, but you cannot see all of it. The calendar shows that the moon was invisible just less than two weeks ago. What phase is the moon in now?
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Fossil sponges are among the oldest known animal fossils. true or false
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A mutation changes the DNA sequence AAGCCTGGCAAT to the new sequence AAGCCTGCGCAAT. What kind of mutation has occurred? A. deletion B. insertion C. duplication D. substitution
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Which of the following states had the highest average yearly precipitation? A. Nevada B. Maine C. North Dakota D. Louisiana
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The damage caused by hurricane Katrina took the form of _______. a. oil spills and building damage b. flooding and mold infestations c. toxic chemicals and sewage d. all of the above
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Which is the genotype of the unknown offspring on row two of the Punnett square above? A. IBIB B. IBiO C. IBIA D. none of the above
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