All vertebrates are chordates but all chordates are not vertebrates, why?
1.
Notochord is replaced by a vertebral column in the adults of some chordates.
2.
The ventral hollow nerve cord remains throughout life in some chordates.
3.
All chordates possess a vertebral column.
4.
All chordates possess notochords throughout their lives.
Correct position of floral parts over thalamus in the mustard plant is:
| 1. | Gynoecium occupies the highest position, while the other parts are situated below it. |
| 2. | Margin of the thalamus grows upward, enclosing the ovary completely, and other parts arise below the ovary. |
| 3. | Gynoecium is present in the center and other parts cover it partially. |
| 4. | Gynoecium is situated in the center, and other parts of the flower are located at the rim of the thalamus, at the same level. |
Identify the correct features of Mango and Coconut fruits.
| (i) | In both, fruit is a drupe |
| (ii) | Endocarp is edible in both |
| (iii) | Mesocarp in Coconut is fibrous, and in Mango, it is fleshy |
| (iv) | In both, the fruit develops from the monocarpellary ovary |
Select the correct option from below:
1. (i), (iii) and (iv) only
2. (i), (ii) and (iii) only
3. (i) and (iv) only
4. (i) and (ii) only
Large, empty colourless cells of the adaxial epidermis along the veins of grass leaves are:
| 1. | Lenticels | 2. | Guard cells |
| 3. | Bundle sheath cells | 4. | Bulliform cells |
Which of the following statements about cork cambium is incorrect?
| 1. | It forms a secondary cortex on its outside |
| 2. | It forms a part of periderm |
| 3. | It is responsible for the formation of lenticels |
| 4. | It is a couple of layers thick |
In cockroach, identify the parts of the foregut in correct sequence:
| 1. | Mouth → Oesophagus → Pharynx → Crop → Gizzard |
| 2. | Mouth → Crop → Pharynx → Oesophagus → Gizzard |
| 3. | Mouth → Gizzard → Crop → Pharynx → Oesophagus |
| 4. | Mouth → Pharynx → Oesophagus → Crop → Gizzard |
Match the following columns with reference to cockroach and select the correct option:
| Column - I | Column - II |
| (a) Grinding of | (i) Hepatic caeca the food particles |
| (b) Secrete gastric | (ii) 10th segment juice |
| (c) 10 pairs | (iii) Proventriculus |
| (d) Anal cerci | (iv) Spiracles |
| (v) Alary muscles |
| Options: | (a) | (b) | (c) | (d) |
| 1. | (iii) | (i) | (iv) | (ii) |
| 2. | (iv) | (iii) | (v) | (ii) |
| 3. | (i) | (iv) | (iii) | (ii) |
| 4. | (ii) | (iii) | (i) | (iv) |
Select the incorrectly matched pair from the following:
1. Chondrocytes - Smooth muscle cells
2. Neurons - Nerve cells
3. Fibroblast - Areolar tissue
4. Osteocytes - Bone cells
Inclusion bodies of blue-green, purple, and green photosynthetic bacteria are:
1. Contractile vacuoles
2. Gas vacuoles
3. Centrioles
4. Microtubules
© 2025 GoodEd Technologies Pvt. Ltd.