MCQ
Ventricular cavity is present in frog:
- ✓On the dorsal surface of the heart
- BOn the ventral surface of the heart
- CBoth (a.) and (b.)
- DNone of the above
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$(i)$ Most of them are fresh water organisms found in standing water.
$(ii)$ They have a protein rich layer (called pellicle) which makes their body flexible.
$(iii)$ They have two flagella, a short and a long one.
$(iv)$ Though they are photosynthetic in the presence of sunlight, but in the absence of sunlight they behave like heterotrophs by predating on other smaller organisms. Identify the correct group on the basis of these characters.
Reason : Essential amino acids can not be synthesized in the human body