chapter 1-4 Flashcards
Density-dependent factors ________.
include the effects of disease, predators and food on a single species within a community
The two processes that determine the world’s current biodiversity are ________.
extinction and speciation rates
The carrying capacity is the ________.
maximum sustainable population that a given environment can support
Grazing animals such as deer are ________.
primary consumers or herbivores
Describe the process of allopatric speciation. A numbered list is acceptable.
Allopatric speciation occurs when a population of organisms becomes separated or isolated from their main group.
The energy content and biomass of ________ is lowest in any food web.
top carnivores
Environmentally and economically acceptable means of controlling introduced invasive species include ________.
public education, introduction of suitable predators, examination of imported goods
Diease is generally considered a density-dependent limiting factor to population growth. Why is this so? Explain
Diseases and parasitism are considered density-dependent limiting factors because as population density increases, they are able to spread more easily within the population, eventually leading to a decrease in population growth.
Groups of organisms with low biotic potential, such as gray whales, that produce at most one offspring every other year ________.
are K-selected
The functional role of a species in its community is its ________.
niche
A small moth pollinates native trees when they bloom in April. Some of the moths emerge in early March and discover a different blooming shrub to use as a resource. This is an example of what, over time, could be ________.
sympatric speciation
A population is a (the) ________.
group of individuals of a single species that live and interact in one area
