Step 1: Moulting is the process in which an organism sheds its exoskeleton or outer layers to grow. It is most commonly observed in arthropods (e.g., insects, crustaceans) and some other invertebrates.
Step 2: Palaemon, commonly known as the prawn, is a crustacean and exhibits moulting as part of its growth process. Prawns shed their exoskeleton periodically to allow for growth.
Step 3: Tapeworms (Option 1) are parasitic flatworms and do not exhibit moulting. They grow by absorbing nutrients from their host.
Step 4: Hydra (Option 3) is a small, freshwater cnidarian that does not undergo moulting. It reproduces mainly through budding.
Step 5: Sponges (Option 4) are simple invertebrates that do not undergo moulting. They grow by cell division and regeneration.
Conclusion: Only Palaemon (the prawn) exhibits moulting among the given options.
Match the following:
List - I | List - II | ||
---|---|---|---|
A) | Thyroid gland | I) | Calcitonin |
B) | Adrenal medulla | II) | Nor epinephrine |
C) | Pineal gland | III) | Melatonin |
D) | Pancreas | IV) | Glucagon |
Study the following and pick up the correct combinations:
S.No. | Spinal nerves | No. of pairs in man | Location |
---|---|---|---|
I | Cervical nerves | 7 pairs | Neck region |
II | Thoracic nerves | 12 pairs | Thorax |
III | Sacral nerves | 5 pairs | Lumbar region |
IV | Coccygeal nerves | 1 pair | Caudal region |
Match the following:
List - I | List - II | ||
---|---|---|---|
A) | Radius, ulna | I) | Fore limb |
B) | Tibia, fibula | II) | Hind limb |
C) | Scapula, clavicle | III) | Pectoral girdle |
D) | Ilium, pubis | IV) | Pelvic girdle |
The percentage error in the measurement of mass and velocity are 3% and 4% respectively. The percentage error in the measurement of kinetic energy is:
If \( L, M, N \) are the midpoints of the sides PQ, QR, and RP of triangle \( \Delta PQR \), then \( \overline{QM} + \overline{LN} + \overline{ML} + \overline{RN} - \overline{MN} - \overline{QL} = \):