Answer:
It is necessary to separate oxygenated and deoxygenated blood separate in mammals and birds to maintain their body temperature. Also, if they both are mixed, the blood will get impure and it would be difficult for the heart to supply impure blood. We also can't live with impure blood so we most probably will die.
No, Humans take evolution through selective breeding and genetically modified organisms.
Answer:
Other helpful techniques include planting more drought-resistant strains of corn and wheat; leaving crop residue on the fields to cover the soil; and planting trees to break the wind.
Answer:
Meiosis | Ploidy | Life Cycles | Phases of Meiosis | Prophase I | Metaphase I ... (for example, one diploid 2n cell producing two diploid 2n cells; one haploid n cell producing ... is sporophyte, while pollen and ovaries contain the male and female ...
Explanation:
It is the first option. Atmospheric nitrogen is very stable so there fore hard to react with. But bacteria contain molecules that can break the bond of nitrogen.
