G. Long Answer Questions
1. Observe the diagram given here. Label the diagram and explain the importance of stage-3 in the diagram.
2. With the help of a flowchart explain the steps involved in the extraction of wool.
3. Explain the life cycle of a silk moth with well-labelled diagram.
4.Name the different kinds of wool and their animal sources.
Answers
Explanation:
1 (i) Plant cell because the cell wall is present and centrioles are absent.
(ii) The above diagram shows the late prophase.
(iii) Metaphase follows the prophase. The chromosomes will be arranged at the equator attached to the spindle fibre.
(iv) In Mitosis: The chromosome number in the daughter cell is the same as that of the mother cell i.e., diploid mother cell gives rise to 2 diploid daughter cells.
In Meiosis: The chromosome number is halved in the daughter cells i.e., the diploid mother cell gives rise to four haploid daughter cells
2 From sheep. Sheep hair has two types of fibers – the beard hair and the skin hair. ...
Shearing. This is the first step of processing fiber into wool. ...
Scouring. ...
Sorting. ...
Dyeing. ...
Straightening, Rolling, and Combing.
3 Life Cycle of Silk Moth. The female silk moth lays about 300 to 400 eggs at a time. The eggs hatch and the caterpillars or silkworms emerge. ... Inside the cocoon, the silkworm enters the second stage of its life (called the pupa) and then the third and final stage to become an adult moth.
4 Names of Animals That Give Wool
Sheep. The most common wool animal is the sheep. ...
Goats. Mohair and cashmere come from goats. ...
Lamas. The Lama genus of animals, all of whom originate in South America, includes llamas, alpacas, vicunas and guanacos. ...
Camels. ...
Rabbits. ...
Musk Oxen.
diagram is in pic of questions no 4
