Hormones secreted by the adrenal __________ are a short-term response to stress or emergency situations
a. hemisphere
b. cortex
c. lobule
d. lobe
e. medulla
Answer: e. medulla
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Which of the following mutations is most likely to cause a phenotypic change?
A) a duplication of all or most introns B) a large inversion whose ends are each in the same region between genes C) a nucleotide substitution in an exon coding for a transmembrane domain D) a single nucleotide deletion in an exon coding for an active site E) a frameshift mutation one codon away from the end of the nontemplate strand
In selection, individuals with two or more extreme fit phenotypes and selects against the intermediate phenotype.
A. convergent B. disruptive C. stabilizing D. directive E. artificial
Which one of the following is the correct classification of vertebrae, from the skull to the pelvis?
A) sacral, coccygeal, lumbar, thoracic, cervical B) cervical, thoracic, lumbar, coccygeal, sacral C) cervical, thoracic, lumbar, sacral, coccygeal D) coccygeal, thoracic, lumbar, sacral, cervical E) coccygeal, thoracic, lumbar, cervical, sacral
In eukaryotic cells, which of the following contains DNA?
A. Nucleus, mitochondria, Golgi apparatus B. Nucleus, endoplasmic reticulum, Golgi apparatus C. Nucleus, nucleolus, Golgi apparatus D. Nucleus, chloroplast, mitochondria E. Nucleus, chloroplast, peroxisome