Answer:
for the continuation of species.. further it's as needy as a person take the meal
Explanation:
It's can be counted as a daily need of people as we take the meal
Answer:D
Explanation: The pulmonary air sacs of birds only permit a unidirectional flow of air through the lungs. Unidirectional flow means that air is inhale and exhale through one trachea alternatively. This means the bird lungs only receive largely fresh air which has a high oxygen content during inhalation and do not receive fresh during exhalation. While air flow bidirectional in mammals.
<span>B) epitope.............</span>
Answer:
A line of thunderstorms in the provides moisture and nitrogen to the crops. The energy in the lightning breaks the N2 molecules apart so they can combine with the oxygen to make nitrogen oxides that can be dissolved in the rain. These forms of nitrogen are essential nutrients for plants. Rain from these storms provide far more to the crops than an equal amount of irrigation can do.
