In seedless plants, haploid gametophytes are produced from diploid spores that undergo mitosis.
haploid spores that undergo meiosis.
diploid spores that undergo meiosis.
haploid spores that undergo mitosis

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D. haploid spores that undergo mitosis.

Explanation:

The Life Cycles of Plants quiz on edge.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.