In human, the amount of air entering and leaving the lungs during inhalation and exhalation is called the:
1.Residual volume
2.Respiratory capacity
3.Tidal volume
4.Vital capacity
3
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In your 11th year in the field you discover what you think is the common ancestor of the new species of ape and all other gorillas. What types of data would give you the best information on the environment of this ancestral organism?
A. gene sequencing of the new species of ape B. anatomical features of the new species of ape C. behavior of the new species of ape D. fossils of plants and animals found with the fossilized common ancestor E. anatomical features of the fossilized common ancestor
Erection occurs when
A. the spongy erectile tissue of the penis becomes engorged with blood. B. the veins flowing out of the penis vasoconstrict. C. the arteries of the penis vasodilate. D. nitric oxide is released. E. All of these events occur to promote an erection.
Hydrogen bonds between different parts of the polypeptide chain result in which level of protein structure?
A. primary B. secondary C. tertiary D. quaternary
Which of the following viral types enter animal cells via fusion with the animal cell membrane?
A. non enveloped viruses B. naked viruses C. enveloped viruses D. All of these choices are correct.