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Tutor profile: Harpreet K.

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Harpreet K.
Tutor for 8 years; Working as a researcher in microbiology
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Questions

Subject: Environmental Science

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Question:

What is an ecosystem?

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Harpreet K.
Answer:

The ecosystem in any environment is a unit that is composed of living and nonliving forms. It includes the interaction of organisms such as plants, animals and micorbes with the surrounding climatic conditions or with each other. An ecosystem can be a terrestrial ecosystem or an aquatic ecosystem. Terrestrial ecosystems are land-based ecosystems whereas aquatic ecosystems are present in water bodies. For example: Deserts are one of the terrestrial ecosystems and oceans form the marine ecosystem among other aquatic ecosystems.

Subject: Biochemistry

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Question:

What is the energy currency of the cell?

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Harpreet K.
Answer:

Adenosine triphosphate (ATP) which is produced in the mitochondria of the cell is called as the energy currency of the cell. It is called with this name because ATPs provide energy to different biochemical reactions or processes occurring in the cell. An organism eats food to obtain energy, this chemical energy generated by the digestion of food is captured and stored by these ATP molecules. The ATP is composed of adenosine nucleotide and phosphates bonded together. The energy is actually stored in two phosphoanhydride bonds connecting three phosphates. Whenever there is a need for energy, these phosphoanhydride bonds break and release energy which is further used in many cellular processes.

Subject: Biology

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Question:

What is reproduction?

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Harpreet K.
Answer:

Reproduction is a biological process where a new individual is produced from the parents. It basically means to produce similar copies to maintain the existence of any particular kind of organism. The offspring or new individuals that are produced are biologically or genetically similar to the parents. This process is one of the important characteristics of living forms. There can be sexual or asexual reproduction. In sexual reproduction, both male and female parents produce gametes that fuse with each other to form a zygote that develops into a new individual. For example humans, dogs. In asexual reproduction, a single parent can give rise to new individuals without the fusion of gametes. For example, amoebae where a single cell extends and divides into two cells and this process continues.

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