MCQ
According to recent knowledge, the pineal body is considered as:
- AA vestigial organ
- BAn organ of intelligence
- CAn endocrine gland
- DAn organ of involuntary action
Explanation:
The pineal gland is also known as pineal body. This gland is also considered as endocrine gland. It secrets melatonin to regulate the body's rhythm.
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$(i)$ In chlorophyceae, the stored food material is starch and the major pigments are chlorophyll $-a$ and $d$.
$(ii)$ In phaeophyceae, laminarian is the stored food and major pigments are chlorophyll $-a$ and $b$.
$(iii)$ In rhodophyceae, floridean starch is the stored food and the major pigments are chlorophyll $-a, d$ and phycoerythrin