Mass of living material at a trophic level at a particular time is called

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12.Ecosystem

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The mass of living material at a trophic level at a particular time is called

net primary productivity

standing crop

gross primary productivity

standing state

(NEET-2015)

Solution

(b) :Standing crop is the total amount of living material in a specified population at a particular time, expressed as biomass (standing biomass) or its equivalent in terms of energy. The standing crop may vary at different times of the year; for example, in a population of deciduous trees between summer and winter.

Standard 12

Biology

Secondary producers are

hard

In an ecosystem

medium

(AIEEE-2004)

Match the List$-I$ with List$-II$ :

List$-I$ List$-II$

$a$ Carbon dissolved in oceans $i$ $55$ billion tons

$b$ Annual fixation of carbon through photosynthesis $ii$ $71 \%$

$c$ $PAR$ captured by plants $iii$ $4 \times 10^3\,kg$

$d$ Productivity of oceans $iv$ $2$ to $10 \%$

Choose the correct answer from the options given below:

medium

(NEET-2022)

Mark the correct match

medium

Assertion : A network of food chains existing together in an ecosystem is known as food web.
Reason : An animal like kite cannot be a part of a food web.

medium

(AIIMS-2011)

List$-I$	List$-II$
$a$ Carbon dissolved in oceans	$i$ $55$ billion tons
$b$ Annual fixation of carbon through photosynthesis	$ii$ $71 \%$
$c$ $PAR$ captured by plants	$iii$ $4 \times 10^3\,kg$
$d$ Productivity of oceans	$iv$ $2$ to $10 \%$

The mass of living material at a trophic level at a particular time is called

Solution

Similar Questions

Secondary producers are

In an ecosystem

Mark the correct match

Assertion : A network of food chains existing together in an ecosystem is known as food web. Reason : An animal like kite cannot be a part of a food web.

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Assertion : A network of food chains existing together in an ecosystem is known as food web.
Reason : An animal like kite cannot be a part of a food web.