In addition to Homo, another genus within the hominins is
A) Cro-Magnon.
B) Australopithecus.
C) Lemur.
D) Tarsius.
E) Habilis.
B
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Imagine that a biologist develops a strain of corn with a lower fat content by choosing low-fat variants and crossbreeding them over several generations. This is an example of
A) inheritance of acquired characteristics. B) convergent evolution. C) natural selection. D) artificial selection. E) artificial mutation.
Which structure is considered part of both the digestive tract ad the respiratory tract?
a) gall bladder b) nasal cavities c) bronchiole d) esophagus e) pharynx
Which of the following describes the classical pathway of complement activation?
A) Complement proteins activate when mannose-binding lectin binds to the pathogen. B) Complement proteins activate by coming into contact with certain blood-clotting proteins. C) Complement proteins activate when triggered by macrophages or neutrophils. D) Complement proteins activate when antibodies bind to a pathogen. E) Complement proteins activate by directly interacting with the pathogen.
Which control method would not be a suitable choice for killing Mycobacteria in a capped culture tube?
A. ultraviolet (germicidal) light B. gamma rays C. 160°C for 2 hours D. 121°C at 15 psi for 15 minutes E. All of these choices are correct.