Answer:
Pandemics occur for two reasons. The first is a change in the infectious agent and the second is in human patterns. Both involve exposing people to agents they don’t have resistance to. Diseases like SARS, avian flu, and the famous Spanish flu all involved a mutation in the virus that resulted in a new disease that no one had resistance too. Examples of the second are when new groups of humans make contact, like small pox amongst native Americans, and possibly the black death.
Explanation:
<h2><em>ANSWER</em><em>:</em><em><u> </u></em><em><u>TRUE</u></em></h2>
<h2><em>EXPLANATION</em><em>:</em><em> </em><em>NOT</em><em> </em><em>SURE</em><em> </em><em>IF</em><em> </em><em>THIS</em><em> </em><em>IS</em><em> </em><em>CORRECT</em><em>.</em><em> </em><em>PLS</em><em> </em><em>TELL</em><em> </em><em>ME</em><em> </em><em>IF</em><em> </em><em>IM</em><em> </em><em>WRONG</em></h2>
Answer: B
Explanation: Traits usually die off when they are unneeded by the organism, or if the trait causes harm to the organism's survival. Through natural selection, over time, the organisms with the best combination of traits for its survival will become the dominating species, and those with weaker traits may not survive long enough to pass off their traits to future offspring.
You can use punnet squares to see possible percentages of genes of the offspring
Answer: Option (d) is the correct answer.
Explanation:
Nucleus of an atom consists of protons and neutrons. Protons are positively charged and neutrons have no charge. So, due to the like charges of protons there occurs electrostatic force of repulsion inside the nucleus of the atom.
But due to similar number of neutrons and protons a force that is able to bind both of them together is known as strong nuclear binding energy.
This force is strong enough that it is able to overcome electrostatic force of repulsion. But when there is great difference in the number of protons and neutrons then binding force is not strong enough.
Hence, the atom becomes unstable and undergoes radioactive decay. So, this means weak forces are responsible for radioactive decay.
Thus, we can conclude that the statement which best describes Yanni’s error is that the strong force is responsible for radioactive decay.
