Answer:
There are different methods of enumeration of bacteria like viable plate count, direct microscopic method, turbidity method, etc. These methods are used to find out the number and concentration of microorganisms in any sample.
In real like the application of using enumeration methods can be seen in diary microbiology, food, microbiology, water microbiology, etc. In these sectors, the enumeration method is used to find out the quality of the food items, water.
Water quality is checked by enumerating the number of coliform bacteria by serial dilution method. In food, bacteria that cause foodborne illnesses are enumerated by using the enumeration method.
Answer: No
Explanation: The number tertiary consumers will be less than the number of secondary consumers because as we move up in the ecological pyramid, the energy decreases.
The largest number of organism having the greatest amount of energy are producers.
They transfer only 10 per cent of the total energy they have. The primary consumers transfer only 10 per cent of the total energy they have to consumers.
The number of organism decreases along with increase in the tropic level of energy pyramid.
Answer:
Option 3, Chromatids remain attached to one another until anaphase
Explanation:
Centromere lies at the center, end or other points of the chromosome and joins the two sister chromatids. During cell division, the spindle fibers attaches at the centromere and detaches the chromosomes during the anaphase of the cell division to ensure that each daughter cell gets equal number of chromosomes at the end of mitosis. Centromere plays an essential role in the separation of chromosomes.
Hence, option 3 is correct
