The prefix "poly-" means "more than one" and the suffix "-spermy" is clearly related to sperm. Accordingly, polyspermy is when more than one sperm fertilizes an egg, something that organisms try to avoid.
To avoid this extra fertilization, specific organisms can use "electrical polyspermy blocks" (the fast process), which changes the negative electrical charge of the egg to positive, thus repelling the also positively charged sperm. The slower prevention process is when an organism undergoes a secretion reaction, or a cortisol reaction, which contributes to envelopping the egg by changing its membrane.
Apartheid was the system of legislation that separated white from non-white, and non-white from each other using their tribal lines.
This was to ensure that the political power the groups have will not be strong enough to overpower the National Party.
International attention was gained when Nelson Mandela, a resistance leader and founder of Umkhonto we Sizwe (“Spear of the Nation”), was imprisoned. Thus, international pressure began to stop apartheid system.
<span>1973 - United Nations General Assembly had denounced apartheid
1976 - </span><span>UN Security Council voted to impose a mandatory embargo on the sale of arms to South Africa
</span><span>1985 - the United Kingdom and United States imposed economic sanctions on the country (Africa).
</span>1989 - <span>F.W. de Klerk, with the support of Nelson Mandela and his supporters, step up as President.</span>
Answer: the answer would be snythesis (d)
Explanation:
The cell membrane helps to transport ions, nutrients, and waste.
Answer: The correct answer is D. After hunting by European settlers, the bison population was reduced to 1:60,000 of its original size.
Explanation:
