The algae at the beginning of an aquatic food chain are at what trophic level?
What is primary producers.
100
The simplest grouping of more than one kind of organism in the biosphere.
What is a community.
100
Nitrogen fixation is carried out primarily by
What is bacteria.
100
Amino acids are the building blocks of
What is proteins.
200
The lowest level of environmental complexity that includes living and nonliving factors is the
What is an ecosystem.
200
Primary producers maker their own food by using __________ to make ________.
What is light energy and carbohydrates.
200
Animals that get energy by eating the carcasses of other animals that have been killed by predators or have died of natural causes are called
What is scavengers.
200
The numbers and kinds of predators in the ecosystem is an example of a ______ factor that affects the size of a population in a specific ecosystem.
What is biotic or density dependent limiting.
200
The organelle responsible for modifying and packaging cellular products.
What is the Golgi apparatus (body, complex).
300
Polar bears live in the arctic. The arctic is their
What is habitat.
300
A model of the complex feeding interactions among organisms in a community from producers to decomposers is called a
What is food web.
300
The way an organism gets its food describes its role or _____.
What is niche.
300
In _________, one organism is harmed and in _______ no organisms are harmed.
What is parasitism and commensalism.
300
During photosynthesis, the ______ -________ stage results in excited electrons and the release of oxygen.
What is light-dependent.
400
What is the term for each step in the transfer of energy and matter within a food web?
What is a trophic level.
400
As resources in a population become less available, the population reaches
What is carrying capacity.
400
The pattern of spacing between individuals across the range of a population is its
What is distribution.
400
After a lava flow, which type of succession would most likely occur?
What is primary.
400
The first stage of cellular respiration.
What is glycolysis.
500
A disease resulting in the deaths of one third of a dense population of bats in a cave would be a
What is density-dependent limiting factor.
500
A bird stalks, kills, and then eats an insect. Based on its behavior, what two ecological terms describe the bird's eating pattern and trophic level?
What is carnivore and consumer.
500
What are two ways a population can decrease in size?
-immigration and emigration
-increased death rate and immigration
-decreased birth rate and emigration
-emigration and increased birth rate
What is decreased birth rate and emigration.
500
Which two biomes have the least precipitation?
What is tundra and desert.
500
Name four inheritance patterns.
What is dominant/recessive (Mendelian), codominance, incomplete dominance, multiple alleles, and polygenic.