Answer:
Biologists can grow specific plants to detoxify an area contaminated with heavy-metal pollution using the method of <u><em> Bioremediation. </em></u>
To rid an area of mosquitoes, biologists introduced a species of fish into bodies of water that feed on the mosquito larvae. This method is an example of <em>Biological Augmentation.</em>
Explanation:
Bioremediation can be described as a process which uses plants or microorganisms to detoxify contaminants that are present in an area. The enzymes of a plant or animal tend to break down the contaminants and hence, we can make an area rid of contaminants in this way.
Biological augmentation can be described as a method by which organisms such as bacteria are introduced in an area to get rid of wastes.
Answer:
African literature consists of a body of work in different languages and various genres, ranging from oral literature to literature written in colonial languages (French, Portuguese, and English). ... As Africans became literate in their own languages, they often reacted against colonial repression in their writings.
Explanation:
Answer:
Biological anthropology
Explanation:
Biological anthropology is a mixture of social studies and biological studies. This science investigates the evolution of human beings in the context of behavior. Biological anthropologists investigate how changes in human physical and genetic profile interfered with their social and cultural behavior through the history. Biological anthropology tries to give us an answer what is the cause of present human diversity. To understand how humans evolved, some scientists study primates (monkeys and apes) and others examine the skeletal remains of our human ancestors.
Answer:
<em>It is the outermost covering of a cell that separates the contents of the cell from its external environment. </em>
<em />
<em>It only allows the entry and exit of some materials. It also prevents the movement of some. Therefore, it is also called a selectively permeable membrane.</em>
<em />
<em>Some substances like carbon dioxide and oxygen can move across the cell membrane due to the process known as diffusion.</em>
<em />
<em>Water also obeys the laws of diffusion. The movement of water molecules through a selectively permeable membrane is called osmosis.</em>
<em />
<em />
<em>Pls mark as brainliest.</em>
Answer:
The answer is below
Explanation:
Some of the factors that may lead to poor results in an optimal heat-fixed bacterial smear for staining are the following:
1. Thickness of the smear: In a situation whereby the smear is too thick, it would be impossible to perform adequate decolorization.
2. Quantity of Decolorizer: if the quantity of the decolorizer or reagent is concentrated, the quality of the stain will be affected
3. Age of the culture: Older cultures have multiple ruptured and dead cells, which result in staining Gram-negative.
4. Duration of Decolorization: Overheated smear during heat fixing, often leads to the rupture of cell walls.
The reason it is necessary to heat fix a smear for simple staining is that:
Heat fixing affects bacterial enzymes original state, which hinders their cell digestion parts, thereby leading to the breaking of the cell. The heat also improves the steadfastness of bacterial cells to the slide.
