Insects that goes through adult stage without becoming pupa are except ________

Analyze the question: The question asks which insect does NOT go from nymph to adult without a pupa stage. In other words, which one does have a pupa stage. The phrase "are except" means we're looking for the odd one out.

Concept: Types of metamorphosis

1. Incomplete metamorphosis (hemimetabolous): Egg → Nymph → Adult. There is no pupa stage. The nymph looks like a small version of the adult. • Examples: cockroach, grasshopper, cricket, termite, locust, dragonfly

2. Complete metamorphosis (holometabolous): Egg → Larva → Pupa → Adult. The larva looks very different from the adult. • Examples: butterfly, moth, housefly, mosquito, beetle, bee, ant, wasp

Step-by-step solution:

• A. Cricket: incomplete metamorphosis, no pupa
• B. Cockroach: incomplete metamorphosis, no pupa
• C. Grasshopper: incomplete metamorphosis, no pupa
• D. Bee: complete metamorphosis (egg → larva → pupa → adult), so it has a pupa stage

Since the question asks for the exception, the insect that does pass through a pupa stage, the answer is bees.

Answer: D. bees

Exam tip: Remember "Nymph = No pupa." If the young one is called a nymph, there's no pupa stage. If it's called a larva (caterpillar, maggot, grub, wriggler), expect a pupa. Bees, butterflies, houseflies and mosquitoes all have larvae, so they have pupae.