The polar vortex of cold air that normally stays above the Arctic has shifted 1 point southward, resulting in extreme winter storms across the US and other
parts of the world. What likely caused the polar vortex to shift? *

A. Long-established climate systems like the gulf stream are upset and throw off the
polar vortex winds

B. The Earth has titled on its axis so that places in the northern hemisphere are receiving
less sunlight at this time of year.

C. Long-established climate systems like the jet stream are upset and throw off the polar
vortex winds

6. in domesticated cats, the following are independently assorting: normal ears (t) is dominant to tufted ears (t); curved whiskers (c) is dominant to straight whiskers (c); the presence of six toes (s) is dominant to five toes (s); gene for hair length is an x-linked codominant. the three phenotypes for hair length are long (xhxh), medium (xhxh), and short (xhxh); medium is the heterozygous condition. given two parents: ttccssxhxh x ttccssxhy how many different gametes could be formed in the female cat with respect to these four traits? how many phenotypes are possible in the offspring from this mating?

Which of the following statements most accurately describes convergent evolution? the process in which two similar species evolve separately from each other and share similar characteristics the process in which a single species evolves into two or more new species the process in which two entirely different species evolve in response to each other the process in which two different species evolve separately from each other but still share similar characteristics

Why do some dna fragments move farther than others during gel electrophoresis? a. because their shapes are different b. because they are different types of molecules c. because the samples are different colors d. because their masses are different