The silkworm, Bombyx mori, feeds exclusively on the leaves of which plant during its larval stage?
A. Castor
B. Mulberry (Morus alba)
C. Eucalyptus
D. Teak
Answer: Option B
Solution (By JKSSB Mock Tests)
The domesticated silkworm, Bombyx mori, is a monophagous insect, meaning it feeds almost exclusively on the fresh leaves of the mulberry plant (primarily Morus alba). The quality and quantity of silk produced are directly dependent on the quality of the mulberry leaves consumed by the larvae. While tasar silkworms feed on oak and castor, the common mulberry silkworm requires Morus alba.
Explanation:
Homologous organs share a common ancestral origin but may have different functions (e.g., forelimbs of vertebrates), indicating divergent evolution.
Explanation:
Angiogenesis is the growth of new blood vessels from pre-existing ones, important in development, wound healing, and tumor growth. Vasodilation is widening, vasoconstriction narrowing of vessels. Hematopoiesis is blood cell formation. Inhibiting angiogenesis is a cancer therapy strategy.
Explanation:
Adenylyl cyclase converts ATP to cyclic AMP, a second messenger. Guanylyl cyclase makes cGMP, phospholipase C produces IP₃/DAG, PKA is activated by cAMP.
No comments yet. Be the first to start the discussion!