Q.1) Fill in the blanks.
1) Frogs breathe through.........
when they are tadpolen.
2) A substance that does not change the colour of an indicator is called........,...........
Answers
Answered by
2
a . Watch tadpoles breathe by sucking in air bubbles at water's surface. ... While tadpoles have gills, most also develop lungs and frequently surface to breathe air, which is essential for survival in water containing low levels of oxygen.
b.Neutral substance does not change the pH because neutral substances are neither acidic nor basic and thus does not change the colour of the indicator.
Answered by
4
1) gills
2) neutral substance
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