Question

Number the following events of plant evolution in sequential order: 1. 1 Multicellular organisms appear. 2. 2 Bacteria can conduct photosynthesis, releasing oxygen into the atmosphere. 3. 3 Bryophytes appear. 4. 4 Seedless, vascular plants appear. 5. 5 Life is able to produce its own food. 6. 6 Gymnosperms and angiosperms appear. 7. 7 Eukaryotes appear.

Answer 1

Ans.

The first green plant (eukaryotic plant) was evolved from simple prokaryotic organisms. The events of plant evolution sequential order is as follow:

-The first autotrophs or chemotrophs that produced energy for chemical compounds, means life was able to synthesize its own food. Hence, the first event is option 5.5.

-The photosynthetic bacteria or blue-green algae were evolved that could perform photosynthesis and release of oxygen. Hence, the second event is option 2.2.

-The first single-celled eukaryotes (green algae) were appeared. Hence, the third event is option 7.7.

-The first multicellular eukaryotes were appeared. Hence, the fourth event is option 1.1.

-The first non-vascular, land plants or bryophytes were appeared. Hence, the fifth event is option 3.3.

-The Seedless vascular plants or pteridophytes were appeared. Hence, the sixth event is option 4.4.

-The seed plants (gymnosperms and angiosperms) were evolved. Hence, the last event was option 6.6.

Answer 2

1. life is able to produce its own food (the first autotrophs produced energy from chemosynthesis, not photosynthesis.)
2. bacteria can conduct photosynthesis, releasing oxygen into the atmosphere
3. eukaryotes appear.
4. multicellular organisms appear.
5. bryophytes appear.
6. seedless, vascular plants appear.
7. gymnosperms and angiosperms appear.