Option D is the correct answer.
To what extent has the presence of a true coelom in animals changed over the course of evolution?
A coelom is a body cavity that is formed from the mesoderm tissue.
Option D - The presence or absence of a true coelom appears to have changed multiple times during the course of evolution.
50x you must take the magnification of the ocular lens (5x) and multiply it by the magnification of the low power lens (10x).
5X10=50
Your blood would not be oxygenated so cells and tissues and muscles wouldn't receive any oxygen
Bees - the young bees (larvae) secrete a sweet liquid for workers to eat becuase they can't digest food.
Butterflies - when they're larvae they eat only plants. When they grow they eat mostly nectar.
Hope it helped,
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