2.ANSWER THE QUESTIONS.
i)What is the stem cells?
ii)Write any two use of stem cells.
iii)Name any two biofertilizers .
iv)What is DNA fingerprinting?
v)Give one use of biotechnology.
Answers
Answer:
i) Stem cells are the body's raw materials — cells from which all other cells with specialized functions are generated. Under the right conditions in the body or a laboratory, stem cells divide to form more cells called daughter cells.
ii) (1)grow new cells in a laboratory to replace damaged organs or tissues
2)correct parts of organs that don’t work properly
iii)Biofertilizers such as Rhizobium, Azotobacter,
iv)DNA fingerprinting is a laboratory technique used to establish a link between biological evidence and a suspect in a criminal investigation. A DNA sample taken from a crime scene is compared with a DNA sample from a suspect.
Answer:
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Explanation:
I)They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions. Cells also contain the body's hereditary material and can make copies of themselves. Cells have many parts, each with a different function.
II)1.grow new cells in a laboratory to replace damaged organs or tissues.
2.correct parts of organs that don't work properly.
research causes of genetic defects in cells.
3.research how diseases occur or why certain cells develop into cancer cells.
4.test new drugs for safety and effectiveness.
iii)Biofertilizers such as Rhizobium, Azotobacter, Azospirilium and blue green algae (BGA) have been in use a long time. Rhizobium inoculant is used for leguminous crops. Azotobacter can be used with crops like wheat, maize, mustard, cotton, potato and other vegetable crops.
iv)DNA fingerprinting is a laboratory technique used to establish a link between biological evidence and a suspect in a criminal investigation. A DNA sample taken from a crime scene is compared with a DNA sample from a suspect.
v) In addition to being used in health care, biotechnology has proved helpful in refining industrial processes through the discovery and production of biological enzymes that spark chemical reactions (catalysts); for environmental cleanup, with enzymes that digest contaminants into harmless chemicals and then die after ...
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