The supportive skeletal structures in the human external ears and the nose tip are examples of:
1.
Areolar tissue
2.
Bone
3.
Cartilage
4.
Ligament
Given are the following five statements (I - V) for your consideration:
| I: | In Equisetum, the female gametophyte is retained on the parent sporophyte |
| II: | In Ginkgo, the male gametophyte is not independent |
| III: | The sporophyte in Marchantia is more developed than that in Polytrichum |
| IV: | Sexual reproduction in Volvox is isogamous |
| V: | The spores of slime moulds lack cell walls |
How many of the above statements is/are correct?
| 1. | Three | 2. | Four |
| 3. | One | 4. | Two |
Identify the molecules (a) and (b) shown below and select the right option giving their source and use.
| (I) |  |
| (II) |  |
|
Molecule |
Source |
Use |
|
|
1. |
(II) Heroin |
Cannabis sativa |
Depressant and slows down body functions |
|
2. |
(II) Cannabinoid |
Atropa belladonna |
Produces hallucination |
|
3. |
(I) Morphine |
Papaver somniferum |
Sedative and painkiller |
|
4. |
(I) Cocaine |
Erythroxylum coca |
Accelerates the transport of dopamine |
The figure below shows three steps (A, B, C) of Polymerase Chain Reaction (PCR). Select the option giving correct identification together with what it represents.
| 1. | A - Denaturation at a temperature of about 50ºC |
| 2. | C - Extension in the presence of heat-stable DNA polymerase |
| 3. | A - Annealing with two sets of primers |
| 4. | B - Denaturation at a temperature of about 98ºC separating the two DNA strands |
Identify the likely organisms (a), (b), (c), and (d) in the food web shown below:
|
(a) |
(b) |
(c) |
(d) |
|
|
1. |
Dog |
Squirrel |
Bat |
Deer |
|
2. |
Rat |
Dog |
Tortoise |
Crow |
|
3. |
Squirrel |
Cat |
Rat |
Pigeon |
|
4. |
Deer |
Rabbit |
Frog |
Rat |
Which one of the following pairs of chemical substances, is correctly categorised?
| 1. | Pepsin and prolactin - Two digestive enzymes secreted in the stomach |
| 2. | Troponin and myosin - Complex proteins in striated muscles |
| 3. | Secretin and rhodopsin - Polypeptide hormones |
| 4. | Calcitonin and thymosin - Thyroid hormones |
A fall in glomerular filtration rate (GFR) activates:
1. Adrenal cortex to release aldosterone
2. Adrenal medulla to release adrenaline
3. Posterior pituitary to release vasopressin
4. Juxta glomerular cells, to release renin
What is the function of germ pores?
1. Absorption of water for seed germination
2. Initiation of pollen tube
3. Release of male gametes
4. The emergence of radicle
© 2026 GoodEd Technologies Pvt. Ltd.