Unlike pinnipeds, sirenians are completely free from the terrestrial environment
Indicate whether the statement is true or false
T
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Fred Griffith's experiment, in which he used two strains of Streptococcus pneumoniae, demonstrated that _____
a. pathogenic bacteria function differently in mice than in other organisms b. harmless bacteria can become transformed into disease-causing bacteria by a bacteria transformation factor c. pure DNA extracted from disease-causing bacteria transformed harmless strains into killer strains d. dead cells lose their genetic information e. DNA is a protein rich in nitrogen and phosphorus
The scientific field of study that analyzes genes and proteins to identify targets for therapeutic drugs is
___________________. Fill in the blank(s) with the appropriate word(s).
Which of the following features is unique to the Class Aves?
a) hair b) notochord c) wings d) shelled eggs e) barbules
The domain _______ contains species that are prokaryotic?
a. Archae b. Bacteria c. Eukarya d. a and b