Food chains are relatively short because
of energy recycling in the ecosystem
energy gain at each trophic level is high
of energy loss at each trophic level
energy flow in an ecosystem is uni-directional
Correct answer is C
No explanation has been provided for this answer.
P → Q → R → S → T Which of the following statements best describes the organism designated R? It
feeds on S
is a primary consumer
is a producer as well as a consumer
is a secondary consumer
Correct answer is D
No explanation has been provided for this answer.
sunlight
carbohydrates
green plants
mineral salts
Correct answer is A
No explanation has been provided for this answer.
Which of the following statements is true about sandy soil? It
has limited air space
is light and easy to dig
drains slowly
is heavy and poorly aerated
Correct answer is B
No explanation has been provided for this answer.
What is the critical limiting factor for plants below the photic zone is an aquatic ecosystem?
Availability of nutrients
Availability of water
Intensity of light
Carbon dioxide concentration
Correct answer is C
No explanation has been provided for this answer.