Which of the following population interactions is advantageous to both populations?
a. commensalism
b. competition
c. mutualism
d. parasitism
e. predation
C
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When a human egg ovulates it arrests in metaphase II until it is fertilized by a sperm. How many chromosomes are present in the egg at metaphase II?
A. 46 B. 2 with sister chromatids still attached C. 4 D. 23 with sister chromatids still attached E. 1
____ are good habitats where local reproductive success is greater than local mortality
a. Metahabitats b. Sink habitats c. Source populations d. Source habitats e. K-selected habitats
A characteristic of life is
A. chemical bonds. B. the use of oxygen. C. the production of CO2. D. cellular organization.
Who played a decisive role in the refutation of theory of 'Spontaneous Generation'?
A. Ignatz Semmelweis B. Alexander Fleming C. Louis Pasteur D. Robert Koch E. Joseph Lister