sperm used in the male side of reproduction
Answer:
nitrogen, phosphorus and potassium.
Explanation:
The three main nutrients are nitrogen (N), phosphorus (P) and potassium (K). Together they make up the trio known as NPK. Other important nutrients are calcium, magnesium and sulfur.
Sponges are the simplest bilateral animal and do lack a body cavity. A sponge has two layers of tissue.
some gets converted into sound energy and escapes into the surroundings.
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