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WorksheetsEcology Review
Total questions: 40
Worksheet time: 1hrs 20mins
If a scientist in New Zealand was studying how a group of herbivores interacted with a group of omnivores, and all of their abiotic surroundings, what level of ecology would she be studying? (a)
If there are 100 KJ of energy available at the secondary consumer level, how many KJ of energy are available at the producer level?
(a)
In this energy pyramid, which type of consumer gets only 10% of the energy stored in plants? (a)
Honey guide birds alert and direct badgers to bee hives. The badgers then expose the hives and feed on the honey first. Then, the honey guide birds eat as well.
(a)
Vines grow on a tree. The vines get light but the tree is not affected. What kind of relationship is this?
(a)
The fox in this food web would be considered a: (a)
The populations of which organisms will most likely increase as a result of a disease that suddenly reduced the population of Texas horned lizards?
Grasses and ants
Ants and grasshoppers
Grasshoppers and Texas Cottonmouths
Texas cottonmouths and red shouldered hawks
Why might an organism have more than one arrow coming FROM them in a food web?
More than one organism may eat them.
They may eat more than one other organism.
This organism gets its energy from multiple sources.
Decomposer
This is an organism that breaks down and gains nutrients from dead organisms.
Predator
This is an animal that lives by preying on other animals.
Producer
This is an organism that supplies matter and energy, also known as an autotroph.
Consumer
This is an organism that relies on other organisms for its food and energy supply; heterotroph
Parasite
This is an organism which feeds on, but usually does not kill, a larger organism
Grass > Grasshopper > Bird > Snake
To get energy
To make amino acids
To make proteins
To make carbohydrates
useable energy
oxygen
water
carbon dioxide
glucose
bacteria
fungi
rain
plants
What type of succession is shown going from figure A to figure B?
(a)
If farmers use a controlled burn to prevent forest fires, what would most likely be the first plants to return?
trees
shrubs
mosses
grasses
Breaking News! A new island has formed off of Hawaii! What must occur for it to become an ecosystem?
Secondary Succession
Aquatic succession
Primary Succession
Ferns must grow
How has the invasion of pythons affected the everglades ecosystem in terms of species numbers?
The pythons could upset the territorial boundaries of native organisms.
The pythons could adapt to overcome diseases common to native snakes.
The pythons could prey on native organisms and cause native populations to decline.
The pythons could begin to interbreed with native snakes and produce a more successful species.
Scientists found, that over a period of 200 years, a mountain pond was transformed into a meadow. During that time, several communities of organisms were replaced by different communities. Which of these best explains why new communities were able to replace older communities?
The original species became extinct.
Species in the older community died from old age.
The abiotic characteristics of the habitat changed.
Diseases that killed the older organisms disappeared.
Abandoned railroad tracks are overgrown with weeds. Ten years later there are small aspen trees growing in the middle of the tracks. This change is an example of:
Primary succession
Biological evolution
Secondary succession
Heterotrophic nutrition
How is primary succession different from secondary succession?
Primary succession starts with soil.
Secondary succession start with bare rock.
Primary succession starts with bare rock, with lichens and moss.
Fire is an example of primary succession.
Which of the following describes how an abiotic factor can impact the population dynamics in an ecosystem?
A parasite that invades a host can reproduce and cause a decline in the host species population.
Organisms that compete for the same resources will keep each other from overpopulating.
Predators will prevent herbivores from depleting the plants and other resources in an ecosystem.
Seasonal variations in temperature can cause some of the individuals in a population to die.
After a volcanic eruption, lava covers the land. What is the order that plants grow to repopulate the area?
Lichens → Shrubs → Grasses → Trees
Lichens → tree → shrubs→Grasses
Grasses → Lichens → Shrubs → Trees
Lichens → Grasses → Shrubs → Trees
Why does biodiversity increase during the course of succession?
Biodiversity refers to the difference in ages of organisms, so some organisms arrive earlier than others.
Over time, the same trees begin to reproduce and take over an area.
Many populations of organisms gradually begin to occupy the same area to create a climax community.
Many organisms move in to the area for a short amount of time, then leave to find a better habitat.
What is the term for when a population is no longer growing because it has reached its set limit in the environment?
exponential growth
population dynamics
food web
carrying capacity
What happens to a population if it grows past its carrying capacity?
all the organisms die
some organisms die
the population keeps growing
more habitats are made
Select the decomposer(s).
Select the secondary consumer(s).
Select the primary consumer(s).
List the pictures of succession in order.
