Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.
(_____ competition) A type of competition in which one organism directly excludes another from the use of resources.
5.
(_____-victim interaction) An interaction between two species in which one species benefits (the _____) and the other species is harmed (the victim).
6.
A consumer that relies on living plant tissues for nutrients.
8.
A group of interacting individuals of a single species located within a particular area.
10.
In ecology, of or referring to an action or process that can continue indefinitely without using up resources or causing serious damage to ecosystems.
13.
(density-_____) Of or referring to a factor, such as weather, that can limit the size of a population but does not act more strongly as the density of the population increases.
14.
(_____ competition) A type of competition in which species compete indirectly for shared resources, with each reducing the amount of a resource available to the other.
15.
(_____ time) The time it takes a population to double in size. The _____ time can be used as a measure of how fast a population is growing.
16.
An interaction between two species in which both species benefit.
17.
An organism that kills other organisms for food.
18.
An organism that lives in or on another organism (its host) and obtains nutrients from that organism.
19.
(_____ displacement) A process by which intense competition between species causes the forms of the competing species to evolve to become more different over time.
Down:
1.
A relationship in which two or more organisms of different species live together in close association.
3.
An interaction between two species in which each has a negative effect on the other.
4.
(_____ mutualism) A mutualism in which each of two interacting species has altered its behavior to benefit the other.
7.
An organism or virus that infects a host and causes disease, harming and in some cases killing the host.
9.
(_____ capacity) The maximum population size that can be supported indefinitely by the environment in which the population is found.
11.
(_____ growth) An type of rapid population growth in which a population increases by a constant proportion from one generation to the next.
12.
(_____ mutualism) A mutualism in which an animal transfers pollen grains from one plant to the female reproductive organs of another plant of the same species and receives food as a reward for this service.