Study guides, Class notes & Summaries

On a global scale, energy _____ ecosystems whereas chemical elements _____ ecosystems. - correct answer flows through ... are recycled in Consider this segment of a food web: Snails and grasshoppers eat pepper plants; spiders eat grasshoppers; shrews eat snails and spiders; owls eat shrews. The shrew occupies the trophic level(s) of _____. - correct answer secondary and tertiary consumers The producers in aquatic ecosystems include organisms in which of the following groups? - co...

Kingdom Animalia Phylum Annelida Class Oligochaeta - correct answer Earthworm Kingdom Animalia Phylum Annelida Class Polychaeta - correct answer Feather duster Worm Kingdom Animalia Phylum Mollusca Class Gastropoda - correct answer Banana Slug Kingdom Animalia Phylum Mollusca Class Gastropoda - correct answer Checkered Periwinkle Kingdom Animalia Phylum Mollusca Class Gastropoda - correct answer Frilled Dog Whelk Kingdom Animalia Phylum Mollusca Class Biva...

Describe the fundamental relationship between autotrophs and heterotrophs in an ecosystem - correct answer Autotrophs (plants) in an ecosystem use light or chemical energy to produce its food and organic compounds that heterotrophs (herbivores) need in order to survive. - Both are part of a never ending cycle that propagates energy for all organism in an ecosystem. Define ecosystem - correct answer consist of all the organism living in a community, as well as the abiotic factors w...

Has a very low net primary production per square meter - correct answer an open ocean Nitrifying bacteria participate in the nitrogen cycle mainly by - correct answer converting ammonium to nitrate, which plants absorb What has the greatest effect on the rate of chemical cycling in an ecosystem? - correct answer the rate of decomposition in the ecosystem Hubbard Brook watershed experiment concluded - correct answer most minerals were recycled within a forest ecosyste...

An ___ consists of all the organisms living in a community, as well as the abiotic factors with which they interact. - correct answer Ecosystem Ecosystems range from a ___, such as an aquarium, to a ___ area, such as a lake or forest. - correct answer Microcosm; large Regardless of an ecosystem's size, its dynamics involve two main processes: ___ ___ and ___ ___. - correct answer Energy Flow; chemical cycling Energy flows ___ ecosystems, whereas matter cycles ___ them. -...

Resistance - correct answer Ability to ward off disease Types of resistance - correct answer Nonspecific resistance: defenses that protect against all pathogens. Specific resistnace: protection agianst a particular pathogen Susceptiblity - correct answer Vulnerability or lack of resistance First line of defense - correct answer 1. First Line of Defense: Non-specific natural barriers which restrict entry of pathogen. Examples: Skin and mucous membranes. second...

variable (n) - correct answer a biological characteristic that differs among individuals ex: plant, animal, gene, cell variable types - correct answer categorical ad numerical categorical variable - correct answer variable has specific categories, finite # of categories ex: treatment, gender Numeric or continuous variable - correct answer quantitative, any value (falls on a continuum) ex: age, weight, biomass, soil pH variability - correct answer the e...

How do the Taylor Glacier bacteria produce their energy? A) photosynthesis B) heterotrophism C) chemoautotrophism D) thermophobism E) chemosynthesis - correct answer chemoautotrophism In ecosystems, why is the term cycling used to describe material transfer, whereas the term flow is used for energy exchange? A) Materials are repeatedly used, but energy flows through and out of ecosystems. B) Both material and energy are recycled and are then transferred to other ecosystems ...

Law 1 of Thermodynamics - correct answer Energy cannot be created or destroyed but can change form Law 2 of Thermodynamics - correct answer every exchange of energy increases the entropy of the universe if energy conversion is inefficient, heat is produced Conservation of Mass - correct answer matter cannot be created or destroyed detrius - correct answer nonliving organic material detrivores/decomposers - correct answer consumers that get their energy from ...

Ecosystem - correct answer The sum of all organisms living in a given area and the abiotic factors with which they interact Law of conservation of mass - correct answer Mass is conserved Primary producers - correct answer Autotrophs that produce their own food through photosynthesis or chemosynthesis Primary consumers - correct answer Herbivores that eat primary producers Secondary consumers - correct answer Carnivores that eat herbivores Tertiary/Quartern...