Poaching refers to the illegal hunting of wild animals in violation of the laws which regulate hunting of wild animals. Over utilization refers to the exploitation of an animal to the point of extinction. Poaching activities include hunting and killing wild animals without licence, using illegal weapons to kill animals, killing animal out of season, etc. All these activities can lead to drastic reduction in the population of animal specie to the extent that the animals become extinct. A good example of an over utilized animal specie is passenger pigeon.
Answer:
The bacterial cells transformed with PUC18 and plasmid lux grow in the presence of ampicillin, because the DNA of bacterial cells had incorporated parts of plasmid DNA and became ampicillin resistant.
Explanation:
The bacteria showing this property is mainly known as Escherichia coli (E. coli). These bacteria cells generally shows no growth in presence of antibiotic like ampicillin. Whereas when these cells are treated with PUC 18 and plasmid lux, then the bacterial DNA undergo certain transformation due to incorporation of strands of DNA of plasmid into them. This transformation make them resistance to ampicillin, when they are cultured in agar media with ampicillin in it.
Answer:
Insecticide DDT(dichlorodiphenyltrichloroethane) have a very harmful effect on the stimuli because it can not be broken down by decomposers such as bacteria and fungi and remain on the surface for a long period of time.
Explanation:
This insecticide is used for controlling pest population in the field but now it is banned around the world due to its harmful effects on humans and other living organisms. This chemical is non biodegradable i. e. cannot be decompose into simpler substances by the action of bacteria and fungi and causes chronic diseases in humans.
The enzymes are the special types of proteins which decreases the activation energy of the chemical reaction. The activation energy is the minimum amount of energy required to start a chemical reaction. Hence the enzymes are the special type of proteins that catalyses or speed up the chemical reaction by decreasing the activation energy of the reaction. Hence the correct answer is option C. Enzymes.
