Because you need respiration to able to function of the rest of organs
The human first appear in geological time 6million years ago in the Miocene epoch. The modern humane evolve just 200,000 years ago
It is quite possible to combine the same two elements to form two different compounds. An example would be carbon dioxide CO2 and carbon monoxide CO. Thus, two elements can form different types of bonds and end up with completely different compounds. Like, Hydrocarbons are compounds made of Hydrogen and Carbon only, and there are many different hydrocarbons. There is a limited number of elements, but a larger number of compounds because of the example demonstrated above.
Answer&Explanation:
According to the Newton gravitational law the force of attraction is directly proportional to the product of body masses and inversely proportional to the distance separating them
Hence correct answer is The mass of the two objects and the distance between them
Answer: Let’s say a desert becomes flooded. Some species would quickly go extinct, disrupting the food web. This flood might cause new species to enter the ecosystem as well, through means such as rafting. Other species would be forced to adapt to the new environment, leading to adaptation and possibly speciation. For a time the ecosystem would not be very stable, but after a relatively short time, 10 or 20 years, the ecosystem could stabilize itself. So my conclusion is that ecosystems are relatively fluid, they can adapt to almost anything if they have enough time and the change in environment isn’t too drastic.
Explanation: