Biology, 29.06.2019 01:30, Frankie103947
The moth species biston betularia has two color morphs, or variants. one has a speckled white and black color, while the other is all black. in the early 1800s in england, the distribution was 10,000 speckled morphs to 1 black morph. that distribution changed dramatically between 1900 and 1950. by 1950, the distribution of the speckled morph had declined to less than 3% of the population and the black morph distribution increased to 97%. which statement most likely explains this change? a. a predator of the moth underwent steep decline, which reduced selective pressures on the moth. b. a chance mutation occurred in one black individual, which gave an advantage to the black morph's ability to survive. c. the changes are due to normal random fluctuations that might be observed in any population over time. d. changes in the environment changed each morph's ability to evade predation in different ways.
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Biology, 22.06.2019 02:30, briizy
Plz ! for many generations farmers in north america have been choosing to cross corn plants with large ears of corn each year this results in the new generation of plants also growing large ears of corn. what is the technique called? a. selective breeding. b. natural selection. c. mitosis. d. asexual budding.
Answers: 1
Biology, 22.06.2019 06:00, 21hendlill
Me with biology endocrine system crossword also image left i need with hw
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The moth species biston betularia has two color morphs, or variants. one has a speckled white and bl...
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