Oceans occupy A percent of the earth surface and have a productivity of B percent of the productivity of the whole biosphere
Choose the option which fits best for A & B in order

The productivity of the oceans is approximately ....the annual net primary productivity of the whole biosphere .

The productivity of the oceans is approximately ....the annual net primary productivity of the whole biosphere .

The NPP of whole biosphere is ul(A) out of which NPP of oceans is ul(B) .

The NTP of whole biosphere is ul(A) out of which NPP of oceans is ul(B) .

Assertion: Oceans are a low productivity ecosystems despite occupying about 70% of the earth surface. Reason: In aquatic ecosystems, productivity is limited by light which decreases with increasing water depth.

Assertion: Oceans are a low productivity ecosystems despite occupying about 70% of the earth surface. Reason: In aquatic ecosystems, productivity is limited by light which decreases with increasing water depth.

Assertion: Oceans are a low productivity ecosystems despite occupying about 70% of the earth surface. Reason: In aquatic ecosystems, productivity is limited by light which decreases with increasing water depth.