Stem of Psilophyton an example of psilogsida is differentiated into an underground rhizome and an aerial part both of which are _________ branched

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The main types of plastids are___________?

A. Chloroplasts B. Chromoplasts C. Leucoplasts D. All of these...

Salivary glands present in front of ear are___________?

A. Sublingual B. Submaxillary C. Submandibular D. Parotid...

Which of the following kidney stones are most common?

A. Calcium oxalate B. Calcium phosphate C. Uric acid D. All of these...

Which of the following is most toxic?

A. Ammonia B. Urea C. Uric acid D. Trimethylamine oxide...

Cell wall is richly impregnated with silica in__________?

A. Rhodophyta B. Phaeophyta C. Baciliariophyta D. Euglenophyta...