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In a moss the sporophyte -
A
is partially parasitic on the gametophyte
B
produces gametes that give rise to the gametophyte
C
arises from a spore produced from the gametophyte
D
manufactures food for itself, as well as for the gametophyte
Detailed Solution
In mosses the dominant phase of the life cycle is the green, leafy gametophyte.
The sporophyte develops from the zygote and remains attached to the gametophyte; it consists of a foot, a seta and a capsule.
The foot is embedded in the gametophyte and absorbs water and mineral nutrients from it.
The capsule of the moss sporophyte contains chlorophyll-bearing tissue, so it can manufacture a part of its own food.
It is therefore only partially dependent (semi-parasitic) on the gametophyte, not completely.
The sporophyte produces spores (not gametes) by meiosis; it arises from the zygote, not from a spore; and it does not supply food to the gametophyte.
So in a moss the sporophyte is partially parasitic on the gametophyte.
The sporophyte develops from the zygote and remains attached to the gametophyte; it consists of a foot, a seta and a capsule.
The foot is embedded in the gametophyte and absorbs water and mineral nutrients from it.
The capsule of the moss sporophyte contains chlorophyll-bearing tissue, so it can manufacture a part of its own food.
It is therefore only partially dependent (semi-parasitic) on the gametophyte, not completely.
The sporophyte produces spores (not gametes) by meiosis; it arises from the zygote, not from a spore; and it does not supply food to the gametophyte.
So in a moss the sporophyte is partially parasitic on the gametophyte.