Answer:
1. The correct answer would be A) allow you to view living cells, while electron microscopes do not.
There are many advantages of light microscope over electron microscope such as:
- It is easy to use as compared to the electron microscope.
- It enables us to view both alive as well as dead specimen whereas electron microscope can be used to view dead specimen only.
- Light microscopes are much cheaper and have much lower maintenance cost as compared to the electron microscope.
2. The correct answer would be C) scanning electron microscope
Scanning electron microscope or SEM is a type of electron microscope which is used to observe surface topography and composition of the specimen. It can achieve resolution of up to 1 nanometer.
3. The correct answer would be 400x
The total magnification of the microscope can be calculated by multiplying the powers of the objective lens and that of the eye lens.
Thus, the magnification of the specimen would be 40*10 = 400x.
Answer:
The benefits of conserving biodiversity are numerous. A large proportion of South Africa's population are directly dependent upon biological resources for subsistence purposes, including the gathering, harvesting or hunting of animals and plants for food, medicine, shelter, fuel, building materials, and trade.
Explanation:
Population decline causes an extreme genetic drift called a bottleneck effect. The correct option is C.
<h3>What is bottleneck effect?</h3>
The bottleneck effect describes how a population's size is reduced and then increased, affecting the distribution of genetic variation among its members.
It happened when the population reduced severely. Events like natural disaster or decline of the population.
Thus, the correct option is C) bottleneck effect.
Learn more about bottleneck effect
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Invasive species can destroy the ecosystem of the area it invades. This can be done by overpopulating and then destroying the environment of the land they invaded. It can also be done by killing or scaring off the native population.
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Answer:
evolution of human works
Explanation:
The cell theory states that all living forms are composed of cells. These cells are the basic structural units of all organisms and they evolved from pre-existing cells present in primitive living forms. From a biological point of view, the evolution of cells is similar to the evolution of human works, which were during the beginning of human civilization less specialized than in modern times. Likewise, somatic cells present in evolutionary recent multicellular organisms are capable of carrying out more complex functions than primitive cells present in unicellular organisms.