A. Mass extinction is the answer
Answer:
Your answer is B). Massive stars undergo a supernova at the red giant phase.
Pure water has a pH level of 7, which means it is neutral on the pH scale. If you want to increase the pH of water, you must add an alkaline substance to it. The pH scale ranges from 0 to 14, with anything above 7 being alkaline, and anything below 7 being acidic.
d. The mutation will be expressed only if the individual has two copies of the recessive allele.
Many disorders can be heritable through the generation. Knowing the patterns of disorder heredity, either it is dominant or recessive, autosomal or sex-linked is a great advantage in making a diagnose. It should be taken into consideration that some diseases can be influenced by environmental factors. For example, a person knows its parents had high blood pressure. That person has a predisposition for high blood pressure too. But, since heredity and family medical history is known, that person can prevent the appearance of the disease by taking care of its condition, performing physical activities, avoiding smoking, fat diet, etc.
