The pore through which pollen tube enters the ovule is the:
A. Hilum
B. Funicle
C. Micropyle
D. Chalaza
Answer: Option C
Solution (By JKSSB Mock Tests)
The micropyle is a small opening in the integuments of the ovule through which the pollen tube usually enters to deliver sperm cells for fertilization (porogamy). The chalaza is the opposite end, funicle is the stalk, hilum is the point of attachment. The micropyle also allows water entry during germination.
Explanation:
Aspergillosis is an opportunistic fungal infection, often affecting the lungs, caused by inhalation of Aspergillus spores. Candidiasis is by Candida, ringworm by dermatophytes, histoplasmosis by Histoplasma.
Explanation:
Charles Darwin's 1859 book 'On the Origin of Species by Means of Natural Selection' laid out the theory of evolution by natural selection. Mendel's work on heredity was published later, Wallace independently conceived natural selection but Darwin's book detailed the evidence comprehensively. Lamarck proposed earlier theories.
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