STD 11 - 18. Neural control and coordination — BIOLOGY STD 11 Science — Question

The replacement of two kingdoms grouping by five kingdom classification was proposed in the year

Expiration will take place when there is:
A. Positive intrapulmonary pressure
B. Negative intrapulmonary pressure
C. Less pressure within lungs as compared to atmospheric pressure

The biggest phylum in regard to the number of species is

Which modification of root does not store food

The first important biological investigation which led to the conclusion that plant makes its substance from water and not from soil was carried out by

What type of placentation is seen in argemone ?

Proximal and distal convoluted tubules are parts of:

Permeability of wall of collecting tubules is regulated by

For a critical study of secondary growth in plants, which one of the following pairs is suitable?

Smooth muscle fibre differ from striated muscle fibre in external covering by