cDNA sequences are expressed sequence tags (EST) that identify protein coding genes. Indicate whether the statement is true or false
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The protrusible rasping organ in a mollusk's mouth that is used to scrape food from the substrate is:
A. a veliger B. a visceral mass C. composed of nacre D. a radula E. an ammonite
Essentially all exchange of gases and other materials between the circulatory system and tissues of the body or the outside world (e.g., in the lungs) occurs in the
A. veins. B. capillaries. C. arteries. D. heart. E. lymphatic system.
Hereditary information (with the exception of some viruses) is preserved in:
A) deoxyribonucleic acid. B) membrane structures. C) nuclei. D) polysaccharides. E) ribonucleic acid.
Which of the following is NOT an exclusive criterion for eusociality?
a. reproductive division of labor b. division of labor c. cooperative rearing d. overlapping generations e. B and D