Biology · Textbook solutions

Ecosystem

Every solved example, exercise, and miscellaneous question, in the order the textbook teaches them. · 20 questions

Exercises

20 q

Fill in the blanks.
Ex 12 Q1 (a) $Plants are called as _______ because they fix carbon dioxide.$
Ex 12 Q1 (b) $In an ecosystem dominated by trees, the pyramid (of numbers) is _______ type.$
Ex 12 Q1 (c) $In aquatic ecosystems, the limiting factor for the productivity is _______.$
Ex 12 Q1 (d) $Common detritivores in our ecosystem are _______.$
Ex 12 Q1 (e) $The major reservoir of carbon on earth is _______.$
Ex 12 Q2 $Which one of the following has the largest population in a food chain?$
Tap an option to check your answer.
Ex 12 Q3 $The second trophic level in a lake is$
Tap an option to check your answer.
Ex 12 Q4 $Secondary producers are (a) Herbivores (b) Producers (c) Carnivores (d) None of the above$
Ex 12 Q5 $What is the percentage of photosynthetically active radiation (PAR) in the incident solar radiation?$
Tap an option to check your answer.
Distinguish between
Ex 12 Q6 (a) $Grazing food chain and detritus food chain$
Ex 12 Q6 (b) $Production and decomposition$
Ex 12 Q6 (c) $Upright and inverted pyramid$
Ex 12 Q6 (d) $Food chain and Food web$
Ex 12 Q6 (e) $Litter and detritus$
Ex 12 Q6 (f) $Primary and secondary productivity$
Ex 12 Q7 $Describe the components of an ecosystem.$
Ex 12 Q8 $Define ecological pyramids and describe with examples, pyramids of number and biomass.$
Ex 12 Q9 $What is primary productivity? Give brief description of factors that affect primary productivity.$
Ex 12 Q10 $Define decomposition and describe the processes and products of decomposition.$
Ex 12 Q11 $Give an account of energy flow in an ecosystem.$