Biology, 04.02.2020 12:47 gildedav001
Over evolutionary time, many cave-dwelling organisms have lost their eyes. tapeworms have lost their digestive systems. whales have lost their hind limbs. how can natural selection account for these losses? a. natural selection cannot account for losses, only for innovationsb. it can account for these losses by the principle of use and disusec. under particular circumstances that persisted for long periods, each of these structures presented greater costs than benefitsd. these organisms had the misfortune to experience harmful mutations, which caused the loss of these structures over a few generations
Answers: 3
Biology, 20.06.2019 18:04
Can you guys me with this question , and you! : why do you think the breastbone of a bird is so much larger than the breastbone of a cat?
Answers: 1
Biology, 21.06.2019 20:00
In eukaryotes, genetic information is passed to the next generation by processes that include mitosis or meiosis. which of the explanations identifies the correct process and supports the claim that heritable information is passed from one generation to another? a. mitosis, followed by cytokinesis, produces daughter cells that are genetically different from the parent cell, thus insuring variation within the population. b. during mitosis, dna replication occurs twice within the cell cycle to insure a full set of chromosomes within each of the daughter cells produced. c. in asexual reproduction, a single individual is the sole parent and passes copies of its genes to its offspring without the fusion of gametes. d. single-celled organisms can fuse their cells, reproducing asexually through mitosis to form new cells that are not identical to the parent cell.
Answers: 1
Biology, 22.06.2019 13:00
Plant species a has a diploid number of 12. plant species b has a diploid number of 16. a new species, c, arises as an allopolyploid from a and b. the diploid number for species c would probably be a) 12. b) 14. c) 16. d) 28. e) 56.
Answers: 1
Over evolutionary time, many cave-dwelling organisms have lost their eyes. tapeworms have lost their...
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