8 5 section 52 question 3 what factors account for

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proved to be only 4.8. 5) Section 5.2 Question #3: What factors account for the global decrease in infant mortality rates and increase in life expectancy over the past 50 years? The infant mortality rate, or the percentage of infants within a population who pass away before age 1, and life expectancy can almost directly be correlated in the sense that they have improved over decades because of the same factors. Infant mortality rates have dropped and life expectancy has increased thanks to factors such as sanitation, water quality, health care, medical advancements, and better food distribution. Chapter 6 Section 6.1 Question #1: When two organisms compete, both have lower population growth rates than when they grow separately. Explain why. Would it be easier to make a basketball shot if you were on the court by yourself or with an opposing team there to defend you? The answer is obvious that it would clearly be easier to make a shot if you are the only person on the court. The same concept can be explained for when two organisms compete for the same resources in one area. If there is more than one species going after the same resources, the population growth rate will be lower because they are concerned about competing with one another for the
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resources. If there is only one species going after certain resources, the specie’s population growth rate will increase because they will have nobody to compete against. This theory was tested by Russian biologist G.F. Gause in the 1930s by growing two different plants and coming to the realization that they always grew more rapidly when they were separated rather than together. 2) Section 6.2 Question #1: Why is herbivory an especially challenging way to obtain food? Herbivores are organisms that get their energy by feasting on plants. These herbivores are unique because they are able to digest the cellulose from the stems of plants due to microbes in their stomachs. This limits the amount of possible herbivores out there because only so many organisms have these microbes in their digestive tracks. With these organisms slowing down the growth of the plants they eat, plants have evolved different defenses against herbivores. These defenses make it challenging for herbivores to eat plants with protection like thorns, irritating hairs, and distasteful or toxic chemicals. This again makes it hard for herbivores to obtain food. 3) Section 6.2 Question #3: The common cold is caused by a viral parasite. New strains of the cold virus spread rapidly, especially in the wintertime. What factors allow new strains to spread so quickly?
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The common cold is referred to the common cold because it is just that – common. Seemingly everyone has had it a couple times in his or her life no matter how careful and clean you are. The reason we have all come across this viral parasite is because there are so many variations of the cold that you can never become immune to it.
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