In primary succession in water, the pioneer species are
Free floating angiosperm
Small phytoplanktons
Rooted hydrophytes
Lichens
Carbon constitutes ______ of dry weight of organism and ______ percentage is dissolved in oceans out of total global carbon.
Community is a group of independent and interacting population of
Given below is a figure of an ecosystem. Answer the following questions.
$(i)$ What type of ecosystem is shown in the figure.
$(ii)$ Name any plant that is characteristic of such ecosystem.
Robert Constanza and his colleagues have put an average price tag....... for ecosystem services
Maximum contribution of $O_2$ is from