So following the octet rule, carbon atom can only form a maximum of 4 bonds because, by then, it will have 8 valence electrons.
At sunrise and sunset, the sun is lowest in the sky, so it creates longer shadows. The shadows are the longest at these times than other times.
Mitochondria is the powerhouse of a cell so with that being said
Birds, unlike mammals, do not have separate exits for urine and feces. Both waste products are eliminated simultaneously through the cloaca. While mammals excrete nitrogenous wastes mostly in the form of urea, birds convert it to uric acid or guanine, which reduces water loss in comparison.