Animal Husbandry - Study Mode
[#341] Which of the following is unsegmented?
Correct Answer
(C) Both A and B
Explanation
Solution: Roundworm and Trematode are unsegmented. Worms with round, non-segmented bodies are known as nematodes or roundworms. They are classified in the phylum Nematoda, which has over 28,000 known species. Trematoda is obligate internal parasite with a complex life cycle requiring at least two hosts. These are unsegmented, leaf-shaped worms that are flattened dorsoventrally. They bear 2 suckers, one surrounding the mouth (oral sucker) and another on the ventral surface of the body (ventral sucker).
[#342] Bacteria responsible for preparation of dahi (curd)
Correct Answer
(C) Streptococcus lactis
Explanation
Solution: Bacteria responsible for the preparation of dahi (curd) is Streptococcus lactis. Curd may contain a wide variety of bacteria like Lactobacillus acidophilus, Lactococcus lactis, Lactococcus lactiscremoris etc, whereas yogurt contains Streptococcus thermophillus and Lactobacillus bulgaricus. It is added to milk, the bacterium uses enzymes to produce energy molecules (ATP), from lactose. The byproduct of ATP energy production is lactic acid. The lactic acid produced by the bacterium curdles the milk, which then separates to form curds that are used to produce cheese.
[#343] The egg should be candled on . . . . . . . . day of incubation.
Correct Answer
(A) 3 rd
Explanation
Solution: The egg should be candled on 3 rd day of incubation. Incubated eggs are candled to determine whether they are fertile and, if fertile, to check the growth and development of the embryo. White eggs should be tested for fertility on the third day. Brown shelled eggs on the fifth or sixth day because it is difficult to see the embryo clearly before this time. Eggs may be candled after 3 days of incubation and every few days thereafter. For best results you should candle eggs in a darkened room or dimly lit conditions. The candler should be held right against the shell at the larger end of the egg where the air sac is located.
[#344] Which type of hen is said to be ideal for hatching chicken?
Correct Answer
(B) Desi
Explanation
Solution: Desi hen is said to be ideal for hatching chicken. Desi hens proved to be ideal for this purpose. Only 10 to 12 eggs can be put under 1 hen. This method of hatching is highly unsatisfactory for large-scale production of baby chicks. Incubators, which provide similar environment as that of broody hens, but are more efficient, are used at present for hatching of eggs.
[#345] Yellow colour of egg is due to
Correct Answer
(D) Xanthophyll
Explanation
Solution: Yellow colour of egg is due to Xanthophyll. The yolk is the nutrient-bearing portion of the egg whose primary function is to supply food for the development of the embryo. Egg yolk is a source of lecithin, as well as egg oil, for cosmetic and pharmaceutical applications. Based on weight, egg yolk contains about 9% lecithin. The yellow color is due to lutein and zeaxanthin, which are yellow or orange carotenoids known as xanthophylls.