1.

The heterocysts in the cyanobacterium are

• site of photosynthesis

• reserve food storage

• enactive enzymes

• nitrogen-fixation

Select the mismatch.

• Tomato - Axile placentation

• Sunflower - Free central placentation

• Pea - Marginal placentation

• Poppy - Parietal placentation

Select the mismatch

• Algae	Thallus
  Chalamydomonas	Unicellular flagellate

• Chlorella

  Unicellular non flagellate

• Ulva	Parenchymatous

• Volvox

  Non- flagellate colonies

Bioluminescence is a characteristic feature of

• Diatoms

• Dinoflagellates

• Slime moulds

• Euglenoid

Identify the type of flagella Column I based on there structures given in Column II.

Column I (Flagella type)	Column II (Structure)
A. Monotrichous	1.
B. Amphitrichous	2.
C. Lophotrichous	3.
D. Peritrichous	4.

• A - 1; B - 2; C - 3; D - 4

• A - 2; B - 1; C - 4; D - 3

• A - 4; B - 3; C - 2; D - 1

• A - 4; B - 1; C - 2; D - 3

What did Engelmann observe from his prism experiments?

• Bacteria could not detect the sites of O₂ evolution.

• Bacteria release excess carbon dioxide in red and blue light

• Bacteria accumulated due to the increase in temperature caused by increase in oxygen concentration

• Bacteria get accumulated towards red and blue light

Read the following statements.

I. Adam's apple in man is formed by thyroid cartilage.

II. The maximum volume of air a person can breath in after forced expiration is vital capacity.

III. About 20-25% of CO, is transported as carbaminohaemoglobin.

IV. Pneumotaxic centre lies in pons.

The correct statement(s) is

• Only I

• I, II

• I, II, III

• I, II, III, IV

A plant produced 50 flowers. Ovary of each flower has 50 ovules. How many fruits and seeds are produced by that plant, respectively?

• 50, 50

• 50, 100

• 50, 2500

• 2500, 2500

The given symbols of floral parts indicate the condition:

% or CA or PA or G

• zygomorphic flower, epipetalous, epiphyllous, superior ovary

• actinomorphic flower, epipetalous, interior ovary

• zygomorphic flower, epiphyllous, epipetalous, superior ovary

• actionmorphic flower, epipetalous, superior ovary

Identify the wrong statement.

• The degree of decrease of chemical potential of water depends on concentration of solute

• Bacteria and fungal spores are killed when they enter into pickels and jams due to plasmolysis

• The process of water excudation is called transpiration

• Reverse plasmolysis will occur when flaccid cells are placed in hypotonic solution