WorksheetsECOLOGY 2
Total questions: 10
Worksheet time: 5mins
Approximately what percent of the potential energy available at one trophic level is passed on to the next trophic level?
80 – 95%
50 – 65%
25 – 40%
5 – 20%
An organism’s “trophic” level refers to ______________.
the rate at which it uses energy
where it lives
what it eats
whether it is early or late in ecological succession
A symbiotic relationship in which both species benefit is best described as _____?
commensalisms
competative exclusion
mutualism
parasitism
The symbiotic relationship between a flower and the insect that feeds on its nectar is an example of
Mutualism because the flower provides the insect with food and the insect pollinates the flower.
Parasitism because the insect lives off the nectar from the flower
Commensalism because the insect does not harm the flower and the flower does not benefit from the relationship.
Predation because the insect feeds on the flower
All of the following statements about the diagram below are correct EXCEPT
Grass ----> Mouse ----> Snake ----> Owl
The mouse is a herbivore
The mouse is at higher trophic level compared to owl
The snake is at the third trophic level.
All of the organisms except grass are consumers
Which of the following best explains why there are seldom more than five trophic levels in a food chain?
Most carnivores function at more than one trophic level.
Trophic levels above this number contain too many individuals
Top carnivores are too few in number to prey effectively
Energy is lost from each trophic level.
Which of the following is true about secondary consumers in an ecosystem?
They eat only plants.
They are eaten by primary consumers
They are smaller and weaker than primary consumers
They are fewer in number than primary consumers
When there is an environmental resistance,
the population will grow unlimitedly
an ideal condition is achieved.
an exponential growth curve will be obtained
a sigmoid growth curve will be obtained
The maximum number of individuals that can be supported by a particular area is a called
Biotic potential
Emigration
Survivorship
Carrying capacity
Which of the following statements are TRUE?
I. Natality = mortality, population is stable
II. Mortality > natality, population size decreases
III. Natality > mortality, population size increase
IV. Natality < mortality, population size increase
I, II and III only
I and III only
I, II and IV only
I, II, III and IV
