Examine the figure given below and select the right option giving all the four parts (A, B, C and D) correctly identified:
| A | B | C | D | |
| 1. | Antheridiophore | Male thallus | Globule | Roots |
| 2. | Archegoniophore | Female thallus | Gemma cup | Rhizoids |
| 3. | Archegoniophore | Female thallus | Bud | Foot |
| 4. | Seta | Sporophyte | Protonema | Rhizoids |
Selaginella and Salvinia are considered to represent a significant step towards the evolution of seed habit because:
| 1. | Embryo develops in female gametophyte which is retained on parent sporophyte. |
| 2. | Female gametophyte is free and gets dispersed like seeds. |
| 3. | Female gametophyte lacks archegonia. |
| 4. | Megaspores possess endosperm and embryo surrounded by a seed coat. |
Consider the following four statements:
| (A) | The sporophyte in liverworts is more elaborate than that in mosses |
| (B) | Salvinia is heterosporous |
| (C) | The life cycle in all seed-bearing plants is diplontic |
| (D) | In Pinus male and female cones are borne on different trees |
The two wrong statements together are:
1. Statements (A) and (B)
2. Statements (A) and (C)
3. Statements (A) and (D)
4. Statements (B) and (C)
At metaphase, chromosomes are attached to the spindle fibres by their:
| 1. | Centromere |
| 2. | Satellites |
| 3. | Secondary constrictions |
| 4. | Kinetochores |
Which one of the following is not considered as a part of the endomembrane system?
| 1. | Lysosome | 2. | Golgi complex |
| 3. | Peroxisome | 4. | Vacuole |
In the history of biology, the human genome project led to the development of:
| 1. | Biosystematics | 2. | Biotechnology |
| 3. | Biomonitoring | 4. | Bioinformatics |
The unequivocal proof of DNA as the genetic material came from the studies on:
| 1. | Bacterial virus | 2. | Bacterium |
| 3. | Fungus | 4. | Viroid |
Function of companion cells is:
| 1. | Loading of sucrose into sieve elements |
| 2. | Providing energy to sieve elements for active transport |
| 3. | Providing water to phloem |
| 4. | Loading of sucrose into sieve elements by passive transport |
Some vascular bundles are described as open because these:
| 1. | are not surrounded by pericycle |
| 2. | are surrounded by pericycle but no endodermis |
| 3. | are capable of producing secondary xylem and phloem |
| 4. | possess conjunctive tissue between xylem and phloem |
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