MCQ
In elephants, the tusks are:
- AIncisors
- BCanines
- CPremolars
- DMolars
Explanation:
Incisors grow into tusks, which can serve as weapons and as tools for moving objects and digging in elephant.
In the African elephants, tusks are present in both males and females, and are around the same length in both sexes, but those of males tend to be thicker.
In the Asian species, only the males have large tusks. Female Asians elephants have very small ones, or none at all.
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Statement $I:$
Decomposition is a process in which the detritus is degraded into simpler substances by microbes.
Statement $II:$
Decomposition is faster if the detritus is rich in lignin and chitin
In the light of the above statements, choose the correct answer from the options given below:
$(i)$ Due to alteration of $DNA$ sequences genotype is change.
$(ii)$ Changes occur in phenotype.
$(iii)$ Variation create in $DNA$