Frond- A frond is a large divided leaf. Here is a young palm frond that fell to the concrete at Hilton Head.
Ethylene- This a hydrocarbon that releases a faint sweet, musky odor when pure. Here is a mango that has released ethylene.
Gymnosperm cone- It is the gametophyte of the plant. here is a pine cone. Female cones are at the bottom of the tree and produce seeds while the male cones are at the top of the tree where they produce pollen.
Lichen- It is an organism that grows with both a fungus and a photosynthetic partner in a symbiotic relationship. Here is a lichen on a tree.
other tissues in the body. Here is an elbow that contains connective tissue.
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