Food Webs Questions What is a trophic level?

What is the name of the trophic level at the bottom of a food chain?

What is another name of the secondary trophic level?

What is an example of a secondary consumer?

What are producers?

Give some examples of producers.

Define: consumers.

What do detritivores do?

What do decomposers do?

Create the food chain that was described in the forest ecosystem (top of pg. 3)

Define: biomass.

What happens to biomass as you go up a food chain?

What happens in an ecosystem at the different trophic levels if there is a loss in plant life?

In the river ecosystem, what would happen to the ants in the area if the salmon population was decreased? Why?

How can humans impact food webs? Explain.

Examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. polyploidy is creating new species. the two populations are not interbreeding freely. hybrid offspring of the two populations begin to appear. one species will increase into a population size twice as large as the other species.

If a baby girl guinea pig looks almost identical to its mother, does this then mean that it inherited more alleles from its mother? explain. (hint: think about the vocabulary words dominant and recessive.)

In sweet pea, gene c is responsible for color production and gene p is responsible for the purple color pigment. both of them are located on two different loci on different chromosomes. the flowers will be purple only when the plant has the genotypes as c_p_. no color will be produced with genotypes: ccpp, ccpp, ccpp, ccpp. thus, gene c controls the expression of gene p. what pattern of inheritance is exhibited here? a. pleiotropy b. epistasis c. multiple alleles