One of them is a submerged hydrophyte
Ceratophyllum
Utricularia
Vallisneria and Hydrilla
Lemna
Which is not true of hydrophytes
Given below is a simplified model ofphosphorus cycling in a terrestrial ecosystemwith four blanks $(A-D)$.Identify the blanks.
Explain carbon cycle.
If there was no $CO_2$ in the earth's atmosphere, the temperature of earth's surface would be
$A$ : Successional process starts only in those areas, where no living organisms ever existed.
$R$ : These areas are not supported by physical environmental conditions.