1. change
The natural selection is a process that occurs as a direct consequence of the living conditions in the environment. When the environment starts to change though, the organisms that live in it face a big challenge. They either have to change, adapt to the new conditions, and thus survive, or if they are not able to do so, to die out. This is the biggest evolutionary pressure for the organisms, and while some come out as winners from it, many others die out .
2. variation
In order for the process of natural selection to occur, the population needs to have some genetic variation. The environment is the ultimate push factor, but if the population doesn't have genetic variation in it, than the species will die out. The genetic variation is very important as in that way the individuals choose who will they mate with, in accordance with their traits, so that only the advantageous traits can be passed on to the next generation, so that it can be more competitive in the environment.
3. traits
The natural selection is a very simple process. The individuals of a population, when choosing a mate, look for the individuals that exhibit traits that are advantageous for survival. Mating with individuals with traits that are advantageous guarantees that the offspring will inherit those traits, thus it will have higher chances to survive. The individuals that do not have advantageous traits though will be avoided as mating partners, and that would rapidly lead to their decline and elimination from the gene pool, as they will not have any offspring to continue their line.
The answer is A, high blood pressure. This is because when a person starts to participate in a activity that they didn't warm up or prepare to do, the person's blood pressure increases as a result of suddenly doing hard work, so the heart starts to quickly pump blood to the body, resulting in the high blood pressure.
Complete question:
Nina has the flu and a high fever. Choose the terms that correctly complete the sentences.
Nina has the flu and a high fever. Her immune system is exhibiting the (Second, First, Third) line of defense. This defense is part (adaptive, innate, acquired) of immunity.
Answer:
Second line of defense
Innate
Explanation: The immune system of individuals is charged with the responsibility of protecting and barricading the body against disease and infections. The form a line of defense which prevents or guards the body against disease invasion.
The immune system lime of defense is generally divided into three namely : The physical and chemical barrier, the non-specific immunity and the specific immunity.
Fever falls under the second immune system line of defense which is the non-specific immunity by speeding up improving repair of damaged tissue and restriction of bacterial growth.
Also, the non-specific immunity is an aspect of the innate immunity component alongside the physical and chemical barrier. Innate immunity component are also called intrinsic component as they are present during birth of an individual and are different from acquired immunity which are learnt over time.
Answer: Dehydration
Explanation:
Dehydration can be defined as the loss of fluid from the body. The loss is more than the intake. When the water content of the body is less then the other minerals of the body gets imbalanced.
Incase of severe dehydration there is a decreases in the weight of the person as the body starts burning fat.
The same happened in case of Joshua were running marathon made Joshua's body weak and dehydrated.
