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When a mammal respires anaerobically for a long time
Which of the following structures is not present in the vascular bundles of a dicot stem?
The following are useful effect of micro-organisms except
Which of the following plant parts does not perform supportive function?
Which of the following organisms has the largest surface area-to-volume ratio?
The following are the functions of supporting tissues in plant except
In which of the following organisms is ammonia excreted as a waste product?
Which of the following statements is incorrect about diffusion?
The presence of a large member of mitochondria in a cell indicates that
The plant cell mostly stores food as
The unit contained in a cell structure responsible for changes in form and shape of organisms is called
Which of these has the most complex level of organization?
All the following organelles have membranes except
The hydra has two body layers of cells called
Which of the following best describes a colony of volvox?
Amoeba obtains its oxygen requirements
Which of the following structural features are adapted for uses other than water conservation?
Complex social behaviour and organization are found mostly in
A certain savanna grasshopper changes colour from green during the rainy season to brown during the dry season and black after dry season bush fires. The reason for these colour changes is that the
The mutation theory of organic evolution was propounded by