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.
Answer:
First, the options:
A. Midazolam
B. Ketamine
C. Nitrous Oxide
D. Bupivacaine
The ANSWER is A.
A. Midazolam
Explanation:
A. Midazolam✔
Midazolam is mainly used for amnesia or sedation in many diagnostic, therapeutic, and endoscopic activities or procedures.
B. Ketamine ❌
It has higher risk of side effects.
C. Nitrous oxide ❌
It won't be preferable for this case, since it can not be breathed in during a bronchoscopy.
D. Bupivacaine❌
This is solely for local anesthesia.
D I think because the trees block out all the sun
Answer:
A national park is a reserved area of land owned by the government which is protected from industrialization, human exploitation, and pollution.
...
Difference Between Wildlife Sanctuary, Biosphere Reserves and National Park.
Wildlife SanctuaryBiosphere ReservesNational ParksNot requiredSubject to the particular area of the biosphere reservePermission is required