"Adjacent chromatids in homologous chromosomes cross over during meiosis in sperm and egg formation" is the one among the following choices that describes what <span>causes genetic variation during human sexual reproductive processes. The correct option among all the options given in the question is the second option.</span>
Explanation:
Absolute dating relies on radioactive elements, which are unstable elements that release energy as they break down.
C.<span>Multiple organisms may be affected by the loss of a plant species.
It's a chain reaction, for example, giraffes eat plants like leaves and twigs of acacia, but there are no more plants. Giraffes won't have any food and its population will decrease. Lions eat giraffes but there are little giraffes so lions will probably decrease and eat another animal or prey. That prey will also decrease as it is now the Lions primary prey.
I hope that makes sense</span>
Nutrient pollution is the situation when due to the excess nutrient levels, excessive amounts of algae grow - so the correct answer is c. excess fertilizer use.
Pouring motor oil down the drain also results in pollution, but in other kind of solution - not nutrient solution.
