It is not possible for two species with the same niche to coexist. one species will eventually drive the other into extinction
Natural selection is when certain environmental qualities cause a species to evolve in order to survive in the environment. Natural selection is a specific part of that, when some of the variations of the species die off because they can't survive, then the ones who survive live to create more living babies with the qualities that allow them to survive in the environment.
D. to help scientist plan an experiment in when ch no animals or humans are harmed.
Answer:
No, this is not a testable hypothesis.
Explanation:
Hypothesizing regarding ice cream flavor preferences and texture is not scientifically testable since it inquires for a subjective statement from the subject who would be taking part in the experiment. Scientific method is a set of objective steps taken to formulate some conclusion about an observation or a phenomenon.
After the 1st half-life 250 g of the radioactive material will be left.
<span>After the 2nd half-life 125 g of the radioactive material will be left. </span>
<span>After the 3rd half-life 62.5 g of the radioactive material will be left. </span>
<span>Therefore after 60 minutes, 3 half lives would have occurred. </span>
<span>Therefore the half-life = 60 / 3 = 20 minutes when 250 grams of the original material would have remained radioactive. </span>
<span>Therefore the answer is A) About 250 gram of the material decayed in 20 minutes.</span>
