Chemistry, 15.07.2019 20:40 dessyrob05

Giraffes with short necks lived in arid regions. over time, grasses disappeared, forcing giraffes to eat from trees. mutations in the genome led to some giraffes inheriting the trait for long necks. over time, there were more giraffes with long necks in the region. what are the two reasons for the change in the population of giraffes? (more than one answer) - adaptation? - artificial selection? - natural selection? - harmful genetic traits?

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I think it would be adaptation and natural selection because both the terms are when an animal adapts to their environment. I hope this helps!

Answer from: hernandezaniyah660

adaptation

natural selection

Natural selection refers to the differential survival of the organisms in the population. It describe the fact that individual that have favorable phenotypic characteristics have better chances of survival over others in the changing environment. Adaptation is a genetic change or mutation that helps organism to survive in it's ecological niche. Due to the helpful nature of these genetic changes they are passed down from one generation to the next generation and favors the survival and abundance of a species.

Adaptation and natural selection has resulted in the change in the population of the giraffes. The giraffes being in short neck adapted the increase in neck length with an effort to obtain leaves from tall tries. The long neck giraffe got the better chances of survival and reproduction, due to natural selection the trait was passed on to generation. This resulted in the evolution of long neck giraffe species.

Answer from: Quest

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. $hbr$ completely dissociates to $h^+$ and $br-$ ions. a is incorrect because $h_2s$ does not fully ionize to $h^+$ and $hs^-$ ions and some remain as the compound $h_2s$ . c and d are incorrect because, $li_2o$ and $libr$ do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise, if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both $li_2o$ and $libr$ have a complete octet so can not accept any electrons which disqualifies them as acids.

Answer from: Quest

answer; 4 electrons;

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Giraffes with short necks lived in arid regions. over time, grasses disappeared, forcing giraffes to...

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