Explanation:
To swim, they move their tails up and down, rather than back and forth as fishes do. This is because whales evolved from walking land mammals whose backbones did not naturally bend side to side, but up and down. ... Whales do the same thing as they swim, showing their ancient terrestrial heritage.
Cetaceans are fully aquatic marine mammals belonging to the order Artiodactyla, and branched off from other artiodactyls around 50 mya (million years ago). Cetaceans are thought to have evolved during the Eocene or earlier, sharing a closest common ancestor with hippopotamuses.
Left to right away from the higher concentration of salt. Fluids try to be in balance, with equal distribution of what’s dissolved in them.
Answer:
Deep hydrothermal oceans and the atmosphere
Explanation:
Earth or space are the two possible origins of simple organic compounds on early Earth.
Answer:
The pairs of chromosomes become arranged on the metaphase plate.
Explanation:
Please mark brainliest and have a great day!
The answer is Natural gas it is the source of energy. Natural gas describe as colorless, odor-less
(smell is added for safety, often found with oil reserves, very efficient form
of heating produces less carbon dioxide and particulates than oil or coal.
