In which group of organisms the Cell walls form two thin overlapping shells which fit together?
1. | Chrysophytes | 2. | Euglenoids |
3. | Dinoflagellates | 4. | Slime moulds |
Human urine is usually acidic because?
1. | hydrogen ions are actively secreted into the filtrate. |
2. | the sodium transporter exchanges one hydrogen ion for each sodium ion, in peritubular capillaries. |
3. | excreted plasma proteins are acidic |
4. | Potassium and sodium exchange generates acidity |
In photosynthesis, the light-independent reactions take place at?
1. Thylakoid lumen
2. photosystem I
3. photosystem II
4. Stromal matrix
In the mammalian eye, the ‘fovea’ is the center of the visual field, where?
1. high density of cones occur, but has no rods
2. the optic nerve leaves the eye
3. only rods are present
4. more rods than cones are found
Pick up the wrong statement.
1. | Cell wall is absent in Animalia. |
2. | Protista have photosynthetic and heterotrophic modes of nutrition |
3. | Some fungi are edible |
4. | Nuclear membrane is present in Monera. |
Among China rose, mustard, brinjal, potato, guava, cucumber, onion and tulip, how many plants have superior ovary?
1. Five
2. Six
3. Three
4. Four
Name the pulmonary disease in which alveolar surface area involved in gas exchange is drastically reduced due to damage in the alveolar walls.
1. Pleurisky
2. Emphysema
3. Pneumonia
4. Asthma
A column of water within xylem vessels of tall trees does not break under its weight because of?
1. Dissolved sugar in water
2. Tensile strength of water
3. Lignification of xylem vessels
4. Positive root pressure
Acid rain is caused by increases in the atmospheric concentration of?
1.
2.
3.
4.
The enzyme that is not present in succus entericulus is?
1. maltase.
2. nucleases.
3. nucleosidases.
4. lipases.