4. Where do spore cases reside on ferns? A on fern flowers
C. on fem roots
B. on fern stems
D. on fern leaves (fronds)

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D. on fern leaves (fronds)

hope it's help

D. on fern leaves (frondes)

Hope it's help you

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.