The __________ consists of skull bones, a vertebral column (backbone), and a rib cage. Fill in the blank(s) with the appropriate word(s)
ANSWER: axial skeleton
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Which of the following is true of the life cycle of mosses?
A) The haploid generation grows on the sporophyte generation. B) Spores are primarily distributed by water currents. C) Antheridia and archegonia are produced by gametophytes. D) The sporophyte generation is dominant. E) The growing embryo gives rise to the gametophyte.
Animals trapped and digested by "carnivorous" plants such as the cobra lily are used primarily as ____
a. an energy supplement during winter months b. a carbon source for the plant c. a nutrient supplement in nutrient-deficient environments d. food for bacteria and fungi that grow symbiotically with the plant roots e. an energy supplement for small plants growing in shady areas
The ancestral lung of fish has developed into a unique structure used for another important function. What is this function?
a. respiration b. buoyancy c. lymph circulation d. excretion of uric acid e. excretion of urea
Which is defined by the presence of two or more different alleles in a population for a given locus?
a. a gene pool b. heterozygosity c. polygenic stasis d. genetic polymorphism e. frequency independent selection