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
D.
Bacteria get accumulated towards red and blue light
Engelmann prism experiment showed effect of light on photosynthesis. He illuminated an alga Spirogyra with different colour of light using a prism. He found that blue and red light is most effective in the run on photosynthesis and bacterium (Rhodospirillum) accumulate on alga in red and blue light.
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
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
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
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 |
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
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
