There are many biotic elements in a rainforest biome. But the most obvious one is trees, because biotic means living and trees are living.
B. vertebrates and invertebrates.
testes → sperm duct → glands → urethra → penis
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A. All are true except for A because there is a certain pattern to all polymers
Flat bones have two thin layers of compact bone which is surrounded by a layer of spongy bone.
