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Biology, 22.06.2019 05:40
Why do we perceive objects as retaining their brightness under different lighting levels?
Answers: 1
Biology, 22.06.2019 11:30
Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.
Answers: 1
Biology, 22.06.2019 12:30
Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled
Answers: 1
Biology, 22.06.2019 17:00
First dropdown options: a. runoff b. condensation c. evaporation second dropdown options: a. photosynthesis b. transpiration c. sweating third dropdown options: a. raindrops b. clouds c. animals
Answers: 1
P: Aa x Aa
G A, a A, a
F1: 1AA : 2Aa : 1aa
Tỉ lệ kiểu hình: 3 đỏ : 1 trắng...
G A, a A, a
F1: 1AA : 2Aa : 1aa
Tỉ lệ kiểu hình: 3 đỏ : 1 trắng...
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