Biology, 29.01.2020 14:00 yolo123321
Of the scenarios below, which represents the occurrence of evolution at its smallest scale?
an individual organism begins as a single cell and develops into an adult, changing dramatically through a series of life stages. an adult human moves from near sea level to a city high in the andes mountains. her physiology changes to improve her performance in the thin atmosphere. a pesticide spray is heavily used on a particular farm. initially it kills 98% of the grasshoppers on contact. over several generations, the local grasshopper population becomes resistant to the pesticide through inheritance of resistance alleles. other nearby grasshopper populations do not change in any noticeable way. over many thousands of years, the beak shape of a bird species changes to exploit a new food source.
Answers: 3
Biology, 22.06.2019 01:30
What are the doorways into and out of cells, attached to the membrane, and built in the rough er.
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Biology, 22.06.2019 02:00
How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.
Answers: 1
Biology, 22.06.2019 06:30
Match the pollutants. 1. a chlorofluorocarbon smoke 2. a biodegradable organophosphate insecticide freon 3. particle pollution paint 4. hazardous waste monoxide 5. carbon is completely burned malathion 6. carbon is incompletely burned dioxide
Answers: 2
Of the scenarios below, which represents the occurrence of evolution at its smallest scale?
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