Biology

Why is the fossil named Ida so important to comparative anatomists?
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which of the following is a characteristic of our sun
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Question 6(Multiple Choice Worth 2 points)Which of the following is a common source of groundwater pollution? Oil slicks Erosion along riverbanks Spraying crop fields with pesticides Throwing used beverage containers into a lake
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Global economic development has led to an increase in the use of fossil fuels. As a result, greenhouse gas emissions have also increased. To fight this problem, some governments require businesses to pay fines if they do not comply with strict environmental regulations. Which of the following could be a negative result of this solution?A) Greenhouse gas emissions might decrease while fossil fuel use increases.B) Businesses might invest in places that lack environmental regulations.C) Greenhouse gas emissions might increase while fossil fuel use decreases.D) Businesses might profit from complying with environmental regulations.
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Starting from the wild mustard Brassica oleracea, breeders have created the strains known as Brussels sprouts, broccoli, kale, and cabbage. Therefore, which of the following statements is correct?A) In this wild mustard, there is enough heritable variation to permit these different varieties.B) Heritable variation is low in wild mustardotherwise this wild strain would have different characteristics.C) Natural selection is rare in wild populations of wild mustard.D) In wild mustard, most of the variation is due to differences in soil or other aspects of the environment.
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Match each characteristic with the correct animal
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what must occur during fertilization in humans in order to produce a male child
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an electrical connection between an electrical circuit or equioment and the earth is called? load-ground-neutral
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While conducting experiments with E. coli, Meselson and Stahl established that during DNA replication, each of the two strands thatcompose the double helix were used as a template for the new strands of DNA. The scientists described the replication method assemi-conservative. Explain what this means in terms of DNA replication
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The initial statement of the ____________ hypothesis proposed that over time a bacterial endosymbiont of an ancestral cell in the eukaryotic lineage lost its ability to live independently.
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Select all that apply.When determining the growth rate, you need to knownatalitymortalitypopulation densityimmigration rateemigration ratecarrying capacity
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In Lewis Carroll's Through the Looking-Glass, the Red Queen tells Alice, "in this place it takes all the running you can do to stay in the same place." How is this statement logically connected with the idea of evolution by natural selection? A. As individuals evolve to better fit their environment, their environment also changes, subjecting the individuals to continually changing selective pressures.B. Running in place is an important measure of optimal running speed, which is a strong correlate of survival and reproduction. C. As populations evolve to become better adapted to their environments, their environments also change, subjecting the populations to continually changing selective pressures. D. As individuals evolve through natural selection, they tend to develop characteristics that cause them to be less adapted to their environment. E. As individuals evolve through natural selection, they tend to move to new places that are very similar to the places in which they originally evolved.
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. How might global warming alter the geographic distributions of species? Use the patterns discovered during your activity to support your argument. Specifically, how would animals that live at various latitudes respond?
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The video describes a coevolutionary arms race between the Plasmodium parasite and its human hosts.True or false? One example of a coevolutionary arms race is when faster deer evolve and favor wolves and cougars that have stronger eyesight and senses of smell.trueArchaeplastids, which include red and green algae and land plants, are thought to have descended from a heterotrophic protist that engulfed a(n) _____.
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Which statement best describes the cycling of carbon between the atmosphere and hydrosphere?A. Trees and plants releasing carbon through respirationB. Volcanic activity releasing carbon into the atmosphereC. Movement of gases from the ocean's surface by diffusionD. Releasing of carbon into the soil when organisms decay
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Three lab groups carried out an experiment to identify the correct molarities for five solutions. Each unknown contained one of the following sucrose concentrations: 0.0 M, 0.2 M, 0.4 M, 0.6 M, 0.8 M, and 1.0 M. Each data entry represents the average of 3 sample replications of 1 cm3 sweet potato cubes expressed as percent change in mass after an overnight (24 hr) soak in the unknown solutions. From the data given, which statement most accurately describes what is occurring in response to a particular unknown solution. A) Unknown solution E contains the highest concentration of sucrose and the change in mass is due to the active transport of sucrose into the cell in exchange for water molecules. B) Osmosis of water molecules from unknown solution A likely caused the increase in mass observed. C) Passive transport of sucrose out of the potato cells explains the change in mass observed for unknown solution F. D) Unknown solution C represents a sucrose molarity slightly lower than the molarity of sweet potato cells, thus water is transported out of the cells.
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Which of the following best describes a biodiversity "hotspot"? Question 18 options: A hotspot is an area near volcanic vents on the ocean floor where the species diversity is high. A hotspot is an area where the rate of species extinction is high. A hotspot is a region where species diversity is high but threatened by habitat loss. A hotspot is a region where large numbers of animals are brought together into an enclosure.
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Broccoli, cauliflower, kale, Brussels sprouts, and cabbage are all just different breeds of a single type of weed commonly found along the shores of the English Channel. The differences between them were all gradually selected for by various farmers. Group of answer choices True False
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The statement "the ability to acquire and use knowledge, solve problems and reason in the abstract, and adapt to new situations in the environment" most closely relates to a description of:A) learning style.B) intelligence.C) achievement.D) field dependence/independence.
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A lab technician provides you with a bacterial pellet labeled "G3". When you observe the pellet under UV light, there is little to no fluorescence. Other than contamination, provide two scientific explanations for what might have happened to cause this outcome.
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What type of interaction between two chemicals causes one chemical that is not toxic to become more toxic?
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Which of the following best describes how cleaning products like chlorine, hydrogen peroxide, and soap influence the infectious rate of a virus on a surface as discussed in the article? Group of answer choices These cleaning products are not effective against reducing viral infections. Only alcohol based produces will cause the viruses to be no longer infectious. These cleaning products break apart the DNA or RNA of the viruses causing them to no longer be capable of reproducing. These cleaning products are used to wash way the viral particles from the surface, but do not disrupt the components of the viruses themselves. These cleaning products break apart the capsules of the viruses causing them to no longer be capable of infecting an individual.
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A recent commercial advertised for a wristband that claimed to restore health and balance by taking advantage of natural frequencies of your biofield. It supports its claim by showing several people first struggling to balance without the wristband and then balancing fine with the wristband. Why should you be skeptical of the claims made in this ad?
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If the pressure angle increases, the minimum number of teeth on a pinion to avoid interference increases true false
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