Of the following, which one lacks chaetae, tentacles and antennae?

Explanation

The question is asking us to identify which of the listed organisms lacks chaetae, tentacles and antennae. Chaetae are stiff hairs or bristles, tentacles are elongated structures that arise from the head of certain animals, and antennae are paired sensory appendages located on the heads of most arthropods and some other animals. Option A, the snail, has tentacles, but lacks chaetae and antennae. Option B, the earthworm, has chaetae but lacks tentacles and antennae. Option C, the millipede, has chaetae but lacks antennae and tentacles. Therefore, the correct answer is option D, the snake, because it lacks all three features: chaetae, tentacles and antennae. Snakes are reptiles and do not possess any of these structures. Understanding the structures of different organisms is an important aspect of biology. It helps us to identify and classify different organisms based on their physical characteristics and to understand how they are adapted to their environments.