Plant Kingdom — Important Questions

It is attached to the gametophyte and derives nourishment from it

Step 1: In bryophytes, the life cycle alternates between gametophyte and sporophyte generations. Step 2: The dominant phase is the gametophyte (haploid), which is photosynthetic and free-living. Step 3: The sporophyte (diploid) develops from the zygote and is NOT free-living — it remains attached to the gametophyte and gets nutrients from it (it is partially or completely dependent). Step 4: Option A is wrong — the dominant free-living phase is the gametophyte, not the sporophyte. Option C is wrong — the sporophyte is diploid and produces spores (not gametes). Option D is incorrect — the sporo

They are green, multicellular buds found in gemma cups on the thallus

Step 1: Liverworts reproduce asexually in two ways — by fragmentation of thalli and by formation of gemmae. Step 2: Gemmae are green, multicellular, asexual buds. Step 3: They develop in small cup-shaped receptacles called gemma cups, which are located on the thalli of liverworts like Marchantia. Step 4: When gemmae become detached from the parent body, they germinate and form new individual plants. Step 5: Option A describes zoospores (flagellated), Option C is incorrect as gemmae are multicellular and formed on the gametophyte, and Option D describes gametes, not gemmae.

The inconspicuous, free-living, photosynthetic gametophyte

Step 1: In pteridophytes, the dominant phase is the sporophyte (the main fern plant with roots, stem, and leaves). Step 2: When spores are produced and germinate, they give rise to the gametophyte generation called prothallus. Step 3: The prothallus is small (inconspicuous), free-living, mostly photosynthetic, and thalloid in structure. It grows in cool, damp, shady places. Step 4: The prothallus bears sex organs — antheridia (male) and archegonia (female). Step 5: Option A describes the sporophyte. Option C describes spores (macro/microspores). Option D describes a sporophyll. The prothallus

They were the first terrestrial plants to possess vascular tissues

Step 1: Vascular tissues (xylem and phloem) are conducting tissues that transport water, minerals, and food throughout the plant body. Step 2: Bryophytes, which came before pteridophytes in evolutionary terms, do not have vascular tissues — they are non-vascular plants. Step 3: Pteridophytes were the FIRST terrestrial plants to evolve vascular tissues (xylem and phloem), which is why they are such an important evolutionary group. Step 4: Option A is wrong — seeds first appeared in gymnosperms. Option C is wrong — sexual reproduction appeared much earlier (even in algae). Option D is wrong — fl