Ans: (d) Food Chain length is dependent upon productivity.
The productivity space hypothesis states that the length of the food chain is directly dependent on two factors – the size of the ecosystem and a measure of productivity. Option B may seem correct but it is inverted and the hypothesis says that the food chain length is dependent on ecosystem size and not the other way around
The productivity hypothesis postulates that... a. Food chain length is dependent upon the number of species...
A fast food chain has been accused of trying to save money by reducing the number of fries in your order when you purchase them in big size. As a stat 2 student, you’re prepared to test these allegations. The parameter you are interested in is: d = avgregular − avgbig where avgregular is the average number of fries in a regular order, and avgbig is the average number of fries in a big-size order. Your null hypothesis is that...
1) In ecology, "productivity" essentially means a) the amount of energy in an ecosystem. b) the amount of work that is accomplished. c) the amount of biomass of organisms generated over time. 2) Of the five patterns showing how species richness varies with productivity, the ________ pattern is least common. a) positive b) u-shaped c) hump-shaped d) negative e) neutral 3) When there is a hump-shaped relationship between productivity and species richness, it is because a) only a few competitively...
which of the following are thought to determine the length of food chains? a. the degree of omnivory b. nutrient output c. disturbance d. the number of homeotherms in the food chain
You will be analyzing this food web (20 species) of a prairie (modified from Fig 16.7 in our textbook:; there are 5 plant species). Some arrows are different colors so that you can count them more easily Marsh hawk Upland plover Weasel TGarter snake Clay-colored sparrow Meadow frog Badger Spider Pocket gopher Prairie vole Cutworm Crow Ground squirrel Grasshopper grass geum chicory phlox Sorghastrum Grassland Compare the prairie community to the one we studied in our last class, which is...
D) phylum, kingdom, order, class, species, family, and genus. E) phylum, family, class, order, kingdom, genus, and species. 9) Ecology is best defined as the study of A. populations. B. the rate of population changes. C. communities. D. how populations are restricted by environmental resistance. organisms as they interact with other organisms and with their physical surroundings. 10) An ecosystem contains A. only the biotic (living) components of the environment. B. only the abiotic (nonliving) components of the environment. C....
Consider the example of the New England Grassland ecosystem. Identify the false statement. Select one: a. plant productivity decreased but plant species evenness (number of species) increased when grasshoppers (herbivores) and wood spiders (carnivores) were both present b. loss of wolf spiders allowed for the grasshopper population to increase c. loss of grasshoppers allowed for plant productivity to increase but plant species evenness to decrease d. all individual plant species increased their numbers by having herbivores and carnivores present
38. Which gas is increasing in the atmosphere and threatening the world with an enhanced greenhouse effect? a. nitrogen b. carbon dioxide c. neon d. fluorocarbons 39. The role an organism plays in the community of an ecosystem that can be described in terms of space, food, temperature, moisture, etc., is called its: a. niche b. microhabitat c. community d. habitat 40. A one-way relationship in which one species benefits at the expense of another is: a. commensalism b. symbiosis...
The length of a covalent bond depends upon the size of the atoms and the bond order. For each pair of covalently bonded atoms, choose the one expected to have the shortest bond length. (A) NEN (B) N-N (A,B) (C) C C (D) C-C (C,D)
species number present is not given
Present in Chaparral Present in Coastal Scrub Present in Oak Woodland What is the gamma diversity of this California countryside landscape as sampled across three different habitat types? Gamma diversity = Species A Species B Species C Species D Species E Species F Species G Species H Species I Species J Species K Species L Species M Species Richness: Gamma Diversity:
Which of the following hypothesizes that the physical and functional status of a certain region of genomic chromatin is dependent upon the patterns of specific histone posttranslational modifications and/or DNA methylation status? a. PTM hypothesis b. Nuclear body hypothesis c. Epigenetic code d. Genetic code