An herbivore occupies the third trophic level
____________________ Indicate whether the statement is true or false.
F, second
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The protein kinase activity of the receptor protein-tyrosine kinase is located ____
a. on the extracellular surface of the membrane b. on the cytoplasmic side of the cell membrane c. within the hydrophobic portion of the lipid bilayer d. in the nuclear membrane e. in the cystol
In a medical emergency, when an individual has stopped breathing on their own, mouth-to-mouth resuscitation can be administered while waiting for the arrival of EMTs, in order to increase that individual’s odds of survival. In order to perform mouth-to-mouth resuscitation, air from a conscious individual’s lungs is forced into the lungs of the unconscious individual. What effect does this have?
a. Forcing air into the unconscious individual’s lungs triggers the sympathetic breathing reflex, whereby the lungs ”remember” to start breathing again. b. Mouth-to-mouth resuscitation prevents the unconscious individual from exhaling their residual volume, which would cause the lungs to collapse and lead to inevitable death. c. Some residual oxygen from the conscious individual’s lungs diffuses into the unconscious individual’s blood, and the increased pressure forces some CO2 saturated air out of their lungs. d. Mouth-to-mouth resuscitation keeps the alveoli of the lungs moist and warm, allowing the lungs to continue exchanging gases with the atmosphere on a passive but adequate level.
____ promote cancer development, while ____ prevent cancer development
a. Oncogenes; tumor suppressor genes b. Tumor suppressor genes; homeobox genes c. Tumor suppressor genes; oncogenes d. Oncogenes; homeobox genes e. Homeobox genes; proto-oncogenes
Which piece of evidence best supports the endosymbiotic theory of organelle evolution?
A. The inner membrane of a mitochondrion and chloroplast resembles a eukaryotic cell while the outer membrane resembles that of a bacterial cell. B. The outer membrane of a mitochondrion and chloroplast resembles a eukaryotic cell while the inner membrane resembles that of a bacterial cell. C. Mitochondria and chloroplasts are much larger than present day bacteria. D. Both mitochondria and chloroplasts divide by mitosis.