16. Organism A: Fish
This biology question covers important biological concepts and processes. The step-by-step explanation below helps you understand the underlying mechanisms and reasoning.
ScanSolve AI Answer
16. Organism A: Fish
Class: Pisces
Reason: Has a streamlined body, scales, fins, and gills for gaseous exchange.
$$\boxed{\text{Class: Pisces, Reason: Streamlined body, scales, fins, gills}}$$
Organism B: Millipede
Class: Myriapoda
Reason: Has an elongated segmented body, many pairs of legs, and antennae.
$$\boxed{\text{Class: Myriapoda, Reason: Segmented body, many legs, antennae}}$$
17. a)
A: Urinary bladder
B: Testis
$$\boxed{\text{A: Urinary bladder, B: Testis}}$$
b) i) Sertoli cells: Provide nourishment and support to developing sperm cells (spermatids) during spermatogenesis. They also form the blood-testis barrier.
$$\boxed{\text{Provide nourishment and support to developing sperm cells}}$$
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