MCQ
A dioecious flowering plant prevents both
- ✓autogamy and geitonogamy
- Bgeitonogamy and xenogamy
- Ccleistogamy and xenogamy
- Dautogamy and xenogamy.
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| Column - $I$ | Column - $II$ |
| $(a)$ Herbivores-Plants | $(i)$ Commensalism |
| $(b)$ Mycorrhiza-Plants | $(ii)$ Mutualism |
| $(c)$ Sheep-Cattle | $(iii)$ Predation |
| $(d)$ Orchid-Tree | $(iv)$ Competition |
$I.$ Antibiotics are chemical substances produced by some microorganisms which can kill or retard the growth of other disease-causing microorganisms
$II.$ Penicillin is the first antibiotic discovered by Alexander Fleming $(1928),$ while working on bacterium Staphylococcusaureus
$III.$ The function of penicillin as an antibiotic was established by Ernst chain and Howard Florey
Which of the statement given above are correct?
$II.$ Chemical theory of origin of life was given by $....B......$