Because before this stage has happened plants can not absorb nitrogen thought here roots which plants need nitrogen to stay healthy
d) Meiosis occurs often because it allows growth and repair of body tissues in multicellular organisms.
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-Payshence
The answer is: The sun is called the ultimate source of energy because it is the source of almost all energies of the earth. Plants convert light energy from the sun into chemical energy (food) by the process of photosynthesis. Animals eat plants and use that same chemical energy for all their activities.
Answer:
A Starfish is Triploblastic meaning they consist of three germ layers. Hydra are diploblastic meaning they consist of only 2 germ layers.
