Identify three reproductive isolating mechanisms and briefly outline how each may contribute to the formation of new

species. What will be an ideal response?


Temporal isolation is a barrier to reproduction when similar species reproduce at different
times.
Behavioral isolation prevents fertilization when similar organisms have distinctive courtship
behaviors.
Hybrid inviability fails to create new species because the hybrid does not reach reproductive age

Biology & Microbiology

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Club moss sporangia form on specialized leaves called ____ that occur near stem tips

a. cladophylls b. archegonia c. thalli d. antheridia e. sporophylls

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The simple food chain: grass ? zebra ? lion can be represented by ____ pyramid(s)

a. an energy b. a height c. a biomass d. energy and height e. energy and biomass

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Which of the following is not an effect of acid deposition?

A. destruction of aquatic food webs B. decrease in the number of species that can survive in the lake ecosystem C. thinning of high-elevation forests D. increase of pH in lakes E. deformities in fish and other aquatic organisms

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