Trace fossil because a trace fossil is a fossil of a footprint, trail, burrow, or other trace of an animal rather than of the animal itself.
The desert and tundra are alike because they both have limited available water.
Depending on baseline oxygen saturation and the pathological condition of the lungs, risks associated with altitude exposure include profound hypoxemia, pulmonary hypertension, disordered ventilatory control, impaired respiratory muscle function, and sleep‐disordered breathing.
I believe the answer you're looking for is cellular respiration.
Well...This might helps <span>Parallel venation is characteristic of monocots, the veins are usually parallel to each other along the length of the leaf. </span>
Pinnate venation is the veins are in a branching pattern, characterized by one major vein(called midrib) with smaller veins extending outward from it.
<span>Palmate venation is characterized by two or more major veins extending outward from one point like the fingers extending form the palm of a hand</span>
