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7 questions
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- Q1The hydra is a very small, simple animal that lives in water. Hydras reproduce asexually by budding, a process in which a bud breaks off an adult hydra and floats away. Which of the following best describes a hydra bud?A hydra bud contains genetic material from its two parents.A hydra bud has half as much genetic material as the parent hydra.A hydra bud has different mutations than the parent hydra.A hydra bud is genetically identical to the parent hydra.60s
- Q2Three cousins have a similar appearance but different face shapes. Which of these cell components are most involved in determining the basic shape of each girl’s face?Cytoplasm, chloroplasts, and genesChromosomes, chloroplasts, and vacuolesVacuoles, nucleus, and chromosomesGenes, chromosomes, and nucleus30s
- Q3A group of students prepared a table listing the types of reproduction that occur in several organisms. Based on this information, which of the organisms can produce offspring that are genetically identical to the parent organism?Cats, hydras, frogs, and ferns onlyFerns onlyAmoebas, yeasts, hydras, and ferns onlyAmoebas and yeasts only30s
- Q4A few years ago the population of male blue moon butterflies on the island of Samoa declined. One hypothesis for the decline of the male butterflies is that a parasite infected the cells of female butterflies. The parasite was passed to offspring through the females’ eggs and killed the male butterfly embryos. At one point during the decline, nearly all the butterflies in the population were females, but after five years the number of males in the population increased significantly. Which explanation most likely accounts for the increase in the number of male butterflies in the five years after the initial parasite problem?Female butterflies in the population that survived had a genetic adaptation that allowed them to transform into male butterflies.Male butterflies in the population that survived were able to prey on the parasites living in the females’ egg cells.Female butterflies in the population that survived were able to protect the male eggs from the parasite and provide extra care for the male offspring.Male butterflies in the population that survived had a gene that made them resistant to the parasite, and they passed the gene on to their offspring.30s
- Q5Which of the following is most likely to cause a change in the genetic traits in an isolated population of a ground-dwelling lizard species?An unusually dry summer in the lizard population’s ecosystemThe introduction of an invasive predator that preys on the brightest-colored individuals in the lizard populationA fast-moving wildfire that burns the canopy of the trees in the lizard population’s ecosystemThe exposure of an individual lizard in the population to radiation that causes a mutation that is not passed on to its offspring30s8.11b
- Q6To fight a bacterial infection, a patient was given an antibiotic to take for 10 days. After the patient finished taking the antibiotics as directed, almost all the bacteria were killed. After another 10 days, the patient was sick again with the same type of infection. What most likely happened?Some of the bacteria were resistant to the antibiotic, and they reproduced.A few bacteria survived the antibiotics and stopped reproducing.The patient’s high fever inactivated the antibiotic, allowing the surviving bacteria to grow rapidly.The antibiotic slowed the life cycle of the bacteria.30s8.11b
- Q7A tiger cub has a pattern of stripes on its fur that is similar to that of its parents. Where are the instructions stored that provide information for a tiger’s fur pattern?In cytoplasm inside cellsIn the mitochondriaOn the cell membraneOn genes within chromosomes30s