B) Nations meeting to discuss the ozone layer.
Answer:Supply energy to cells
Explanation:
The tetrapod-like characteristics are;
a neck, flat head with eyes on top and interlocking ribs.
Tiktaalik is a large fresh water fish that has both fishlike and tetrapod-like characteristics. Tetrapods are four-legged vertebrates such as amphibians, reptiles. Tiktaalik has scales and gills like fishes but it also possesses unusual fins, a neck, interlocking ribs and flattened head with eyes on top (similar to the head of a crocodile).
It is necessary to calibrate the ocular micrometer with each objective because the magnification of each objective lens are different. The numerical value is specific and only holds for a specific objective ocular lens. So, they should be checked accordingly.
