Unit 7
What is gene flow?
Whenj an organism introduces its alleles into a new population.
How does a Community differ from an Ecosystem?
an ecosystem includes both the biotic and abiotic factors
A true statement about parasitism is that parasites
may cause their hosts to become more vulnerable to predators.
Competition for food cannot occur___
between animals from two different ecosystems.
Which of the following statements explains why the growth of orchids on the high branches of tropical trees is an example of commensalism?
The trees are neither benefited nor harmed.
Mutations are important because they bring about____
genetic variation needed for a population to evolve.
A niche is defined as___
the role of an organism within its community
The relationship between a Canadian lynx, a large wild cat, and a snowshoe hare, rabbit, is an example of____
predator and prey
A true statement about parasitism is that parasites is____
may cause their hosts to become more vulnerable to predators
The relationship between a Canadian lynx, a large wild cat, and a snowshoe hare, rabbit, is an example of____
predator and prey.
If global climate change caused no snow to form where to snowshoe rabbit lives, what would happen to the rabbit’s fur after several generations?
The fur will remain brown all year
Competition for food cannot occur
between animals from two different ecosystems
Yellowstone national park introduced wolves back into the park in 1995 in order to help control populations of elk and bison, which is an example of what type of limiting factor?
Density dependent
In 1995, the Ebola virus killed thousands of villagers in Sub Saharan Africa.What type of limiting factor is it and identify the specific type of situation?
Density dependent, disease
K strategies are likely to_____
have a limited amount of reproductive events during their lifecycle.
How does natural selection lead to evolution?
Helpful variations accumulate among surviving members of the species.
If a predator’s population experiences exponential growth, the population of its prey will most likely
decrease quickly
What term is used to refer to the many feeding relationships that are possible in an ecosystem?
Food web
While on a nature walk, Taylor overturns a rotting log and discovers an ant colony gathered together under the log. Which disperal model is represented by the ants?
clumped
What is a animal that is successful because it moves quickly, reproduces rapidly, and has a waterproof external skeleton?
Ant
Why is biodiversity important to ecosystems?
Helps population adapt to ecology changes.
group of interbreeding Emperor Penguins living together on a particular beach is an example of ___
Population
Which of the following examples would be LEAST LIKELY to be considered a symbiotic interaction?
A fox hunts and feeds on rat.
A shark and dolphin both develop dorsal and pectoral fins to help with steering and maneuvering in the water. This would be an example of ______________ since the animals do not share a common ancestor even though they have developed similar structures.
Convergence
Evolution can be defined as a genetic change in?
Species