Consider statements about animal husbandry: 1. Silkworms feed on mulberry leaves. 2. Honeybees communicate through the waggle dance. 3. Fish farming is called sericulture. Which are correct? MCQ with Answer and Explanation
Consider statements about animal husbandry: 1. Silkworms feed on mulberry leaves. 2. Honeybees communicate through the waggle dance. 3. Fish farming is called sericulture. Which are correct?
A. 1 and 3 only
B. 1 and 2 only
C. 2 and 3 only
D. 1, 2 and 3
Answer: Option B
Solution (By JKExamLibrary)
The domesticated silkworm, Bombyx mori, is a monophagous insect that feeds exclusively on the leaves of the mulberry plant (Morus alba). Honeybees perform a 'waggle dance' on the honeycomb to communicate the direction and distance of food sources to other worker bees. Fish farming is called pisciculture or aquaculture; sericulture specifically refers to the rearing of silkworms for silk production. Thus, statements 1 and 2 are correct.
Explanation:
The Krebs cycle (citric acid cycle) occurs in the mitochondrial matrix in eukaryotes. The enzymes for the cycle are soluble in the matrix. The inner membrane houses the electron transport chain and ATP synthase. Cytoplasm is the site of glycolysis, chloroplast stroma is the site of the Calvin cycle. Thus, the matrix is the correct location.
Explanation:
Stanley Miller and Harold Urey simulated early Earth conditions and obtained amino acids (like glycine and alanine) by applying electric discharge to a mixture of gases.
Explanation:
Iodine deficiency impairs thyroid hormone synthesis, leading to elevated TSH and enlargement of the thyroid gland (goiter). Iodized salt prevents it.
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