An ideal surface for respiration should
An ideal surface for respiration should
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An ideal surface for respiration should
When the blood leaves the capillary bed most of the carbon dioxide is in the form of
The phenomenon through which root cells of a plant take in nitrate ions from the surrounding soil is
All the members of kingdom Protista are
Which of the following vertebrates has haemoglobin dissolved in the plasma?
The resemblance of euglenoids with plants and animals is significant in terms of
In which animal does the heart NOT receive oxygenated blood?
A cell wall consisting of two shells which overlap and fit together like a Petri dish is a characteristic of
Scientists are working on producing a wingless variety of silk moths to increase the yield of silk. The above statement shows the significance of which of the following branches of biology?
In ectomycorrhizae the hypa