List of practice Questions

Choose the incorrect statements regarding Siphonopoda:
I. They show open type of circulatory system.
II. Brain is enclosed in cartilaginous cranium.
III. Some possess ink gland.
IV. Development includes trochophore larva.
Assertion (A): Nitrosomonas is a Chemoautotrophic bacteria.
Reason (R): Chemoautotrophs derive energy from sunlight and carbon from CO\(_2\).

Match the following: 


 

Assertion (A): Root pressure does not play a major role in water movement in tall trees.
Reason (R): Root pressure is responsible for pushing up water to small heights in stem.
Assertion (A): Thymosin plays a major role in cell-mediated immunity
Reason (R): Thymosin promotes the production of antibodies

Assertion (A): Some essential elements can alter the osmotic potential of a cell. 
Reason (R): Sulphur is the main constituent of several coenzymes. 
 

Assertion (A): Animals recapitulate the biochemical aspects of their ancestors. 
Reason (R): Mammalian embryo first excretes urea, then uric acid and finally ammonia. 
 

A mother plant having 16 chromosomes produced ovules and underwent megasporogenesis, then the ploidy of the nucleus of A, B, C, D is: 


 

Identify A and B in the diagram given below: 


 

Study the following and pick up the correct combinations:

In humans, the teeth that appear very late, usually at the age of 21 years are:

Identify the correct combinations from the following: 


 

Choose the correct statement among the following
A. The first action spectrum of photosynthesis was observed in the Cladophora experiment.
B. Chlorophyll 'b' will appear blue-green in the chromatogram.
C. In the biosynthetic phase of photosynthesis, ATP and NADPH are used.
D. In photosynthesis, light saturation occurs at 10% of full sunlight.
E. In CAM plants, RuBisCo will be absent.

Match the following 

Proteins that help in the destruction of the infected cells are
Assertion [A]: The gradual and predictable change in the species composition of a given area is called ecological succession.
Reason [R]: Biotic community is slow and undergo changes with the passage of time.

Match the following: 

Removal of introns and joining of exons in defined order is called:
The driving force of evolution is:
Correct floral formula of mustard plant:
In female cockroach, ovaries lie in these segments.

Assertion [A]: The species that invade a bare area are pioneer species 
Reason [R]: In primary succession, lichens or Phytoplanktons invade rocks and water respectively

Study the following and pick up the correct statements:
I. As the binary fission in Paramecium occurs parallel to longitudinal axis of the body, it is called homotheogenic fission.
II. As the daughter Paramecia formed after binary fission are like mirror images, the fission is called symmetrogenic fission.
III. Multiple fission in Amoeba is called sporulation.
IV. Union of pronuclei of the gametes is called amphimixis.
Choose the correct statements among the following:
I. Bird flu is a fungal disease affecting poultry.
II. Propolis is bee glue used to seal the cracks in the honeycomb.
III. The world's livestock population in India and China together is more than 70%, but their contribution to world's farm produce is 25%.
IV. Inactivated whole agent vaccine acts against typhoid.
Which combination of statements is correct?
Stem tubes, Corn, Rhizome, Cladophyll, Bulbil, Stolon modifications shown by this correct sequence of plants