If pea plants with round and green seeds (RRyy) are crossed with pea plants having wrinkled and yellow seeds (rrYY), the seeds developed by the plants of F₁ generation will be :

options

1. 50% round and green
2. 75% wrinkled and green
3. 100% round and yellow
4. 75% wrinkled and yellow

The breakdown of glucose has taken the following pathway :

$\text {Glucose} \xrightarrow {\text {(a)}} \text {Pyruvate} + \text {Energy} \xrightarrow {\text {(b)}} \text {Lactic acid} + \text {Energy}$

The sites ‘a’ and ‘b’ respectively are :

options

1. Mitochondria and Oxygen deficient muscle cells
2. Cytoplasm and Oxygen rich muscle cells
3. Cytoplasm and Yeast cells
4. Cytoplasm and Oxygen deficient muscle cells

An old person is suffering from an eye defect caused by weakening of ciliary muscles and diminishing flexibility of the eye lens. If the defect of vision is ‘a’ which can be corrected by lens ‘b’, then ‘a’ and ‘b’ respectively are :

options

1. Hypermetropia and convex lens
2. Presbyopia and bifocal lens
3. Myopia and concave lens
4. Myopia and bifocal lens

Which of the following groups do not constitute a food chain ?

(a) Wolf, rabbit, grass, lion

(b) Plankton, man, grasshopper, fish

(c) Hawk, grass, snake, grasshopper, frog

(d) Grass, snake, wolf, tiger

options

1. (a) and (d)
2. (a) and (c)
3. (b) and (c)
4. (b) and (d)