Goiters are often produced in the ____ , a gland that plays a key role in metabolism by secreting the thyroxine and triiodothyronine hormones
Fill in the blank with the appropriate word.
thyroid gland
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Convergent evolution refers to:
A. the evolution of a different character more than once in separate groups. B. the evolution of the same character more than once in separate groups. C. the evolution of the same character in related groups. D. the evolution of a different character in related groups.
Alternate forms (the DNA sequences indicated by alphabetic abbreviations) of the same gene are called Select one:
a. traits. b. chromatids. c. chromosomes. d. centromeres. e. alleles.
What effect would a decrease in the amount of greenhouse gases in Earth's atmosphere have?
A) cooler average global temperatures B) warmer average global temperatures C) no change in average global temperatures D) cooler temperatures in the northern hemisphere and warmer temperatures in the southern hemisphere
Which group is made up of almost exclusively decomposers?
A. Plants B. Fungi C. Animals D. Bacteria E. Protists