What are the most important transformers of energy in ecosystems?
A. detritivores
B. plant and algae
C. animals
D. All of these choices are correct.
E. None of these choices are correct.
B. plant and algae
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In the spiral staircase model of DNA, the rungs are
a. deoxyribose sugars. b. hydrogen bonds. c. nucleotide base pairs. d. phosphate groups. e. composed of all of these.
Genetic variation is accomplished by all but one of the following. Choose the exception
A) the events of meiosis I B) crossing over C) independent assortment D) the events of meiosis II
Microspore mother cells produce microspores. What do microspores then develop into?
A. synergids B. pollen grains C. megaspores D. endosperm E. egg cells
Yeasts are members of which of the following?
A. Ascomycetes B. Basidiomycetes C. Glomeromycetes D. Chytrids E. Zygomycetes