Heritable information exists as discrete units called genes, which are located on ________
Fill in the blank(s) with correct word
chromosomes
You might also like to view...
In marine sticklebacks, the Pitx1 gene is ____, but in freshwater sticklebacks, the Pitx1 gene is ____
a. not expressed and spines are present; expressed and spines are absent b. not expressed and spines are absent; expressed and spines are present c. expressed and spines are present; not expressed and spines are absent d. expressed and spines are absent; not expressed and spines are present e. present so spines develop; absent so spines do not develop
In an unstimulated neuron, the plasma membrane is most permeable to ________ ions
A) sodium (Na+) B) sugar C) calcium (Ca2+) D) potassium (K+) E) chloride (Cl?)
Cultures of a bacterial species were incubated out on the incubator shelf, in an anaerobic jar and in a candle jar. After incubation there was moderate growth of cultures in the candle and anaerobic jars, but heavy growth of the culture on the incubator shelf. This species is a/an
A. facultative anaerobe. B. microaerophile. C. aerobe. D. capnophile. E. anaerobe.
Which statement provides the best explanation of the need for self-tolerance screening of lymphocytes?
A) The process which generates the vast array of diverse antigen receptors is a random process that could produce receptors which will bind to the body's own tissues. B) Self-tolerance involves "self" lymphocytes which bind to and form a protective layer over all body tissues. C) Lymphocytes which would attack the body's own tissues are never generated. D) The process which generates the vast array of diverse antigen receptors is a highly-controlled process, so the generation of receptors which can bind to the body's own tissues is a rare occurrence due to a genetic mutation. E) It is necessary to have some lymphocytes with receptors that are self-tolerant to respond to intracellular infections by viruses.