Dandelions, Taraxacum officinale, are plants that produce fruitlike propagules that are actually produced asexually. Sexual reproduction is very rare in this organism. Which species concept would be least useful in defining dandelions as a species?
A. Phylogenetic species concept.
B. Biological species concept.
C. Evolutionary species concept.
D. Ecological species concept.
E. Both the evolutionary and ecological species concepts.
B. Biological species concept.
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Use the following study to answer the following question(s): A researcher applies varying amounts of fertilizer (0, 2, 4, 8, 10 units) to 50 potted tomato plants. All other variables that may affect the outcome (watering, temperature, sunlight, plant size, etc.) are kept the same from pot to pot. At the end of the growing season, the tomatoes grown on each plant are weighed to determine which fertilizer level produced the largest tomato yield.Which variable is the dependent variable?
A. The plant size at the end of the growing season B. The tomato yield at the end of the growing season C. The temperature D. The fertilizer amount
A ________ is a disease that primarily infects animals but can be transmitted to humans
A) nosocomial infection B) zoonosis C) vector infection D) mudurane
The dark shadings in the above map show the distribution of ________ across the world
A) primary economic activities B) secondary economic activities C) tertiary economic activities D) localization economies E) backwash effects
An example of an integrator in maintaining homeostasis is the ________ .
a. glands b. brain c. skin d. muscles e. ears