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Biology Learning Targets 1-3 Study Guide
1. What level of organization is represented by all the living organisms in an area?
All living organisms would be a community. All of the living organisms AND their
nonliving environment would be an ecosystem.
2. A population is … all of the living organisms of the same species in the same area
3. List the Ecology Levels in order from simple to complex and give an example for
each.
Cell- bone cell
Tissue- bone tissue
Organ- bone
Organ system- skeletal system
Organism- human
Population- all of the human in Glasgow
Community- all of the humans and other living things in Glasgow
Ecosystem- all of the living things in Glasgow and their nonliving environment
Biome- deciduous forest (all of our area of the U.S.)
Biosphere- the Earth
4. Define Biotic factor- a living organism in the environment
5. Give 4 examples of Biotic factors: tree, dog, mushroom, human
6. Define Abiotic Factor- a nonlivjng factor in the environment
7. Give 4 examples of Abiotic factors- soil, rocks, water, air
8. Looking at the diagram, fill in the chart.
Biotic factors
Abiotic Factors
Bird
Water
Trees
Air
Grass
House
Fish
Boat
Man
Fishing rod
Pond lillies
Dead tree
9. Define Limiting factors- things that limit how big a population can get. They keep
a population at or near its carrying capacity.
10. Give 4 examples of limiting factors- disease, drought (or other weather
conditions), lack of habitat, food, or other resources, competition
Learning Target 2.1
Use the following picture to answer question
11. If the Waterlillies disappeared, predict what could happen to the fish population?
If the waterlillies disappeared, then tadpoles would die. Since sea otters wouldn’t have
tadpoles to eat, then they would eat more fish so the fish population would decrease.
12. If a late frost kills all of the acorns and other nuts in an ecosystem, what will mostly
likely to occur to the deer population?
If all of the acorns and other nuts were killed, then the squirrels wouldn’t have as much
to eat so they would eat grass and tress, leaving less food for the deer, so the deer
population would decrease due to a lack of vegetation to eat.
13. If new predators are introduced into an area, causing the population of prey to
decrease, what must occur in order for the population to stabilize (balance)?
The population of predators would decrease as well, since they would have less food to
eat.
14. Define carrying capacity. The maximum number of organisms that an ecosystem
can support.
15. Give an example of carrying capacity.
Since the Earth can only support so many humans, we are running out of space to live in
certain countries as well as lack of food in some areas of the world and lack of other
resources (such as clean water, etc.) Also, diseases, aging, and other things will
continue to keep the human population at or near its carrying capacity (the maximum
number of humans that the Earth can support). All of the things listed above are
considered limiting factors that will, in one way or another, keep the human population
at carrying capacity here on Earth.
16. Define competition. The struggle for survival in a habitat with limited resources
17. List and define the three types of symbiotic relationships.
Mutualism-both organisms benefit
Commensalism- one organism benefits and one is unaffected.
Parasitism- one organism benefits (the parasite) and the other is harmed (the host)
18. Give 3 examples for each type of symbiosis.
Mutualism- sea anemone and clownfish, bee and flower, oxpecker and rhinoceros
Commensalism- shark and remora, barnacle and whale, silverfish and army ant
Parasitism: mouse and flea, human and tapeworm, deer and tick