MCQ
Bivalents in meiosis are
- ✓Tetrad
- BPairs of non-homologous chromosomes
- CPairs of several chromatids
- DPairs of homozygous chromosomes
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| Column $I$ | Column $II$ |
| $(i)$ Tricoderma | $(a)$ Deuteromycetes |
| $(ii)$ Yeast | $(b)$ Basidiomycetes |
| $(iii)$ Bread mould | $(c)$ phycomycetes |
| $(iv)$ Smut | $(d)$ Ascomycetes |
Assertion $(A)$:
Osteoporosis is characterised by decreased bone mass and increased chances of fractures.
Reason $(R)$ :
Common cause of osteoporosis is increased levels of estrogen.
In the light of the above statements, choose the most appropriate answer from the options given below: