Answer: A, B, and D
Explanation:
1. A - mitosis produces offspring that are genetically identical to the parents so A can't be true.
2. B - meiosis produces offspring that are haploid (they only contain one copy of the chromsomes and not 2 like the parent gametes) so B isn't true.
3. D - all of the above
Snowshoe hares undergo seasonal color changes, white for winter snow and brown for spring/summer.
Answer:
They found evidence of an impact crater in Mexico
Explanation:
The K-Pg boundary is the boundary between the Cretaceous period and the Paleogene period, but also marking the end of the Mesozoic era and the beginning of the Cenozoic era. This boundary is dated to roughly 66 million years ago. The K-Pg boundary is characterized with a mass extinction. The dominant organisms on Earth all died out, including the dinosaurs, both terrestrial and aquatic, as well as the flying reptilians, with only the birds surviving from that super-family. The reason for the mass extinction has been an impact with an asteroid or a comet, that was very large and hit the Earth where the Yucatan Peninsula in modern day Mexico is located. The impact was devastating, with heat waves, tsunamis, earthquakes, triggering of the majority of the volcanoes, wildfires, all combined managed to devastate the environment, thus big portion of the species living in it as well. The lucky survivors were smaller organisms, and the mammals turned out to be the most successful in occupying the empty niches and have became the dominant organisms on the planet.
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Answer:
The correct answer is - AABb/AaBb : aaBB/Aabb would be 1:1.
Explanation:
The cross between AaBb and AAbb will produce AB, Ab, aB, aB and Ab, Ab, Ab, Ab gametes respectively. These gametes from zygote and produce the two phenotypic character one with AABb/AaBb and aaBB/Aabb. The first phenotype would have both dominant traits while in others have only A dominant and B recessive in the phenotype of offspring.
Thus, the correct answer is - AABb/AaBb : aaBB/Aabb would be 1:1.