Which of the following is not an attribute of a population?
1. Natality
2. Mortality
3. Species interaction
4. Sex ratio
The oxygenation activity of RuBisCo enzyme in photorespiration leads to the formation of:
| 1. | 1 molecule of the 3-C compound |
| 2. | 1 molecule of the 6-C compound |
| 3. | 1 molecule of a 4-C compound and 1 molecule of the 2-C compound |
| 4. | 2 molecules of the 3-C compound |
Match the following concerning essential elements and their functions in plants:
| Column I | Column II | ||
| (a) | Iron | (i) | Photolysis of water |
| (b) | Zinc | (ii) | Pollen germination |
| (c) | Boron | (iii) | Required for chlorophyll biosynthesis |
| (d) | Manganese | (iv) | IAA biosynthesis |
| (a) | (b) | (c) | (d) | |
| 1. | (iv) | (iii) | (ii) | (i) |
| 2. | (iii) | (iv) | (ii) | (i) |
| 3. | (iv) | (i) | (ii) | (iii) |
| 4. | (ii) | (i) | (iv) | (iii) |
Which is the important site of formation of glycoproteins and glycolipids in eukaryotic cells?
1. Peroxisomes
2. Golgi bodies
3. Polysomes
4. Endoplasmic reticulum
Select the correct events that occur during inspiration.
(a) Contraction of diaphragm
(b) Contraction of external inter-costal muscles
(c) Pulmonary volume decreases
(d) Intra pulmonary pressure increases
1. (c) and (d)
2. (a), (b) and (d)
3. only (d)
4. (a) and (b)
The roots that originate from the base of the stem are:
1. Primary roots
2. Prop roots
3. Lateral roots
4. Fibrous roots
Match the following columns and select the correct option.
| Column I | Column-II | ||
| (a) | Floating Ribs | (i) | Located between second and seventh ribs |
| (b) | Acromion | (ii) | Head of the Humerus |
| (c) | Scapula | (iii) | Clavicle |
| (d) | Glenoid cavity | (iv) | Do not connect with the sternum |
| (a) | (b) | (c) | (d) | |
| 1. | (i) | (iii) | (ii) | (iv) |
| 2. | (iii) | (ii) | (iv) | (i) |
| 3. | (iv) | (iii) | (i) | (ii) |
| 4. | (iv) | (ii) | (i) | (iii) |
If the head of the cockroach is removed, it may live for a few days because:
| 1. | The cockroach does not have a nervous system |
| 2. | The head holds a small proportion of the nervous system while the rest is situated along the ventral part of its body |
| 3. | The head holds 1/3rd of the nervous system while the rest is situated along the dorsal part of its body |
| 4. | The supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen |
Identify the incorrect statement.
| 1. | Sapwood is involved in conduction of water and minerals from roots to leaves. |
| 2. | Sapwood is the innermost secondary xylem and is lighter in colour |
| 3. | Due to deposition of tannins, resins, oils etc., heartwood is dark in colour. |
| 4. | Heart wood does not conduct water but gives mechanical support. |
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