37.1-37.13 Flashcards
(24 cards)
Organism
individual
Population
Group of organisms of the same species
Community
All populations of organisms living in the same area
When populations of different species compete for limited resources, we call this
Interspecific Competition
Which of the following types of interspecific interaction benefits both organisms?
Mutualism
Interspecific competition occurs when the ____________ of two species ____________.
niches, overlap
True or false: Interspecific competition increases the carrying capacity for competing species within an area. If false, make it a correct statement.
False, reduces the carrying capacity
Mutualism
Both Benefit
Competition
One is benefited and other is killed
Consider two populations of organisms: gazelles and cheetahs. Briefly explain how this predator-prey relationship can actually drive adaptations in both species.
Natural selection weeds out the organisms that are unable to compete well in this relationship.
It selects for organisms in both populations that have traits best suited for predation or avoiding predation
Would you expect a fungal pathogen to have more or less of a negative effect on a population of genetically modified corn plants where there was very little genetic diversity? Briefly explain your answer.
You would expect the fungal pathogen to have more of a negative effect. With reduced genetic
diversity, the plants will have less variability in their traits to resist the fungus.
Every food chain must begin with a ____________.
group of producers
What feature is characteristic of all organisms in trophic levels above the producers?
Above the producers are heterotrophs
What would happen to an ecosystem if all the decomposers were removed?
Organic matters would not be broken in dead organisms. Organic matter would build up in the ecosystem
What is the relationship between a food chain and a food web?
A food web is many food chains
Could an organism like the red-tailed hawk be both a quaternary consumer and a tertiary consumer? Briefly explain your answer either way
Quaternary consumer because the plant was eaten by the grasshopper then the mouse then the snake and then hawk ate the snake
Is it possible for two biological communities to have the same species richness but have very different species abundance? Briefly explain your answer.
Yes it is possible to have the same species richness but can have more than the other.
Removal of a keystone species from a community will
likely reduce species richness.
Primary Succession
No soil
Ex. Lava
Secondary Succession
Soil
Fire
A wildfire swept through parts of Yosemite National Park in the summer of 2013. This type
of event would be considered a(n) __________________.
Secondary Succession
A grocery store goes out of business. The building and parking lot sit vacant for over 15 years. Over time, you notice the parking lot becoming more and more overgrown with vegetation. What kind of succession is this?
Primary Succession
A(n) ____________ is a non-native species that was introduced accidentally or intentionally to an ecosystem.
invasive species
You are staying at a campsite that has a lake for boating. A large sign out front asks that, as soon as your boat leaves the water, you drain the bilge water on land and wash the outside of the boat with a 5% bleach solution. What are the campsite owners concerned about?
They are concerned about the transfer of aquatic organisms to a different body of water. Those could be invasive in another area.
