MCQ
Leaf fall occurs on abscission layer is formed when the content of
- AAuxin increases
- ✓Auxin decreases
- CAbscisic acid decreases
- DGibberellic acid decreases
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$(i)$ Crossing over
$(ii)$ Synapsis
$(iii)$ Terminalisation of chiasmata
$(iv)$ Disappearance of nucleolus
$(i)$ Some members are saprophytes or parasites while a large number of them are decomposers of litter and help in mineral cycling.
$(ii)$ They reproduce only by asexual spores known as conidia.
$(iii)$ Mycelium is septate and branched.
$(iv)$ Alternaria, Colletotrichum and Trichoderma are examples of this class. Which of the following class of fungi is being described by the above statements?