Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

27 Cards in this Set

  • Front
  • Back
3. What is a niche?
the full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditions.
4. In what ways is food part of an organism's niche?
a niche includes the type of food the organism eats, how it obtains this food and which other species use the organism as food
5.a. true or false
No two species can share the same niche in the same habitat
5.b. T or F
Different species can share the same niche in the same habitat
5.c. T or F
Two species in the same habitat have to share a niche to survive
5.d. T or F
Different species can occupy niches that are very similar
6. When does competion occur
Competition occurs when 2 species compete for food if they occupy the same niche.
7. What is a resource?
any necessity of life, such as water, nutrients, light, food or space
8. What is often the result of direct competition in nature?
Direct competition in nature often results in a winner and a loser w/ the losing organism failing to survive.
9. What is the competitive exclusion principle?
States that no 2 species can occupy the same niche in the same habitat at the same time.
10. What is predation?
an interaction in which one organism captures and feeds on another organism.
11. When predation occurs, what is the organism called that does the killing and eating, and what is the food organism called.
When predation occurs, the organism that does the kiting and eating is called the predator and the food organism is called the prey.
13.a. Decsribe Mutualism
both species benefit from the relationship.
13.b. Describe Commensalism
1 member of association benefits and other neither helped nor harmed.
13.c. Describe parasitism
1 organism lives on/inside another organism and harms it.
14. The organism from which a parasite obtains nutritional needs is called a (an) BLANK
15.a. T or F
Parasite generally weaken but do not kill their host.
15.b. T or F
Parasites obtain all or part of their nutritional needs from the host.
15.c. T or F
Parasites neither help nor harm the host.
15.d. T or F
Parasites are usually smaller than the host.
16. What is ecological succession?
gradual changes in living communities that follows a disturbance.
18. The first species to populate an area when primary succession begins are called?
pioneer species.
1.b. Define Abiotic factors
physical, or nonliving factors that shape an ecosystem
ex. climate, wind, nutrient availability, sunlight
1.a. Define Biotic factors
biological influence in organisms within an ecosystem.
Ex. ecological community
2. What do the biotic and abiotic factors together determine?
Together biotic and abiotic factors determine the survival and growth of an organism and the productivity of the ecosystem in which the organisms live.
12. What is symbiosis?
any relationship in which 2 species live closely together.
17. What is primary succession?
on land, succession that occurs on surfaces where no soil exists.