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Biology

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Feb 20, 2024

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docx

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Darwin was the first scientist to recognize that life evolves. True False Which of the following is not necessary for natural selection to occur? reproduction inheritance of acquired characteristics genetic variation selective pressure All animals that we recognize as spiders have 4 pairs of legs. Therefore, 4 pairs of legs is considered ______________ for spiders. a homologous trait an analogous trait Camels and giraffes are more closely related to each other than to zebras. So with respect to zebras, what is likely true about camels and giraffes? they would have more similar DNA sequences they would share more homologous traits They would have a more recent common ancestor All of the above What is the reason why different organisms may share a homologous trait? The trait was passed down from a common ancestor The trait evolved independently in each due to similar selective pressures. What is the reason why different organisms may share an analogous trait? The trait was passed down from a common ancestor The trait evolved independently in each due to similar selective pressures. What word best sums up the cause of genetic drift? fitness randomness selection mutation Due to the selective pressure of available food sources, a population of finches evolved larger and larger beaks over the course of many generations. This is an example of what? disruptive selection stabilizing selection directional selection sexual selection Which mechanism of evolution is the only one that is adaptive? mutation gene flow natural selection genetic drift Which mechanism of evolution is the ultimate source of new alleles? mutation gene flow natural selection genetic drift
Which two Domains of life are on the same branch of the phylogenetic tree? Archaea and Bacteria Bacteria and Eukarya Eukarya and Archaea In which group of organisms are there species that can thrive in boiling temperatures? Bacteria Protozoa Algae Archaea Which Domain do plants belong to? Bacteria Archaea Eukarya Which of the following do plants and fungi have in common? They are both eukaryotes They are both heterotrophs They are both prokaryotes They are both autotrophs Most animal species are insects. Which of the following groups contains the most plant species? gymnosperms ferns angiosperms mosses Which of the following characteristics do sponges and cnidarians not have in common? multicellular heterotrophic cells have a cell wall cells are diploid Which of the following animals is not a mollusk? clam squid anemone snail Which type of worm must molt in order to grow larger? nematode earthworm flatworm leech
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