A basic source of the confusion is that in the course of evolution whole
suites of genes have apparently been transferred sideways among the
major branches. Among animals, genes are passed vertically from parent
to child but single-celled creatures tend to engulf each other and
occasionally amalgamate into a corporate genetic entity. It has long
been argued that mitochondria, the tiny organelles that handle the
energy metabolism of eukaryotic cells, were once free-living bacteria
that were enslaved by an early eukaryote. Mitochondria still possess
their own, bacteria-like DNA but many of their genes have emigrated into
the eukaryotic cell's own DNA in the nucleus.
Answer:
I am writing this in response to a letter regarding evolution. Evolution is increasingly solid, not shaky. Darwin’s “theory” or explanation was a way of understanding what he had discovered (which did not include genes, chromosomes, DNA or nucleotide bases). Our explanations now include genetics and the commonality of mutation.
Proofs are solid, not in question by serious scientists. Direct observation is one, which we see in the fact that this year’s flu evolved a little too far from last year’s, so flu shots are less effective this year than we would like them to be.
Fossils tell the story well: whales with legs, dinosaurs with feathers and Tiktaalik. The latter was found in the Canadian north and is part fish, part amphibian, before there were ever any amphibians. Imperfection is a good proof: think of your useless appendix, the very bad design of your ankles, knees, and back (talk to a chiropractor about that). You have big toes because they used to be useful thumbs for your grasping feet.
Many other animals and even plants similarly have flaws that show their evolutionary past. Two large human chromosomes reflect the coming together of two chimpanzee chromosomes each.
Hope it helps,
Please mark me as the brainliest
Thank you
[ Answer ]
<em><u>Animals that can handle and have the body type for the cold. </u></em>
[ Explanation ]
<em>Tundra Biome: </em>Coldest biome, low temperature, little precipitation
<em>Animals best suited to fit this: Muskox, arctic hare, mammoth, polar bear, snowy owl, etc.</em>
These animals have thick fur and can adapt and handle the cold and harsh weather easily.
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They will spread to non-endemic regions, especially in highlands areas. This is attributed to global warming that is resulting in increased global temperatures. Mosquitoes were know to only be endemic to warm regions such as coastal strips. As once cooler regions begin to warm up, mosquitoes will spread to the areas. Malaria will thus be more prevalent.
The ultimate source of energy for most organisms is the Sun.
