When the margins of sepals or petals overlap one another without any particular direction, the condition is termed as:

1. Vexillary

2. Imbricate

3. Twisted

4. Valvate

You are given a fairly old piece of dicot stem and a dicot root. Which of the following anatomical structures will you use to distinguish between the two?

1. Secondary xylem

2. Secondary phloem

3. Protoxylem

4. Cortical cells

Which one of the following statements is correct?

Tracheids differ from the tracheary elements in:

1. Having casparian strips

2. Being imperforate

3. Lacking nucleus

4. Being lignified

Example of an edible underground stem is:

1. Carrot

2. Groundnut

3. Sweet potato 

4. Potato

Which of the following structures performs the function of mitochondria in a bacteria?

The solid linear cytoskeletal elements having a diameter of 6 nm and made up of a single type of monomer are known as:

1. Microtubules

2. Microfilaments

3. Intermediate filaments

4. Lamins

The osmotic expansion of a cell kept in water is chiefly regulated by:

1. Mitochondria

2. Vacuoles

3. Plastids

4. Ribosomes

During which phase(s) of the cell cycle, amount of DNA in a cell remains at 4 C level if the initial amount is denoted as 2C:

1. G₀ and G₁

2. G₁ and S

3. Only G₂

4. G₂ and M

Match the following and select the correct answer: 

1. A-iv, B-ii, C-i, D-iii

2. A-i, B-ii, C-iv, D-iii

3. A-i, B-iii, C-ii, D-iv

4. A-iv, B-iii, C-i, D-ii