The normal human chromosome number is _______.
a) 2n = 23
b) n = 23
c) 2n = 46
d) n = 46
Ans: c) 2n = 46
You might also like to view...
In which of the following forms of reproduction does an unfertilized egg develop into a new individual?
A. parthenogenesis B. budding C. fragmentation D. conjugation E. binary fission
The secretion of each of the hormones from the anterior pituitary requires ____
a. stimulation from the posterior pituitary b. that they first be secreted from the neurons of the hypothalamus c. one capillary bed d. positive feedback mechanisms e. the action of minute amounts of releasing hormones
Which statement regarding exotoxins and endotoxins is true?
A. Endotoxins and exotoxins are highly immunogenic, allowing for the development of protective antibodies and vaccines. B. Endotoxin has targeted activity, whereas exotoxins have systemic effects when released. C. Endotoxin is released from the cell wall of dead bacteria, whereas exotoxin is released from live bacteria. D. Endotoxins and exotoxins bind to specific receptors on a bacterial cell, leading to the pathological events associated with the toxins.
Which of the following is NOT a characteristic of protozoa?
A. most exhibit asexual reproduction. B. they are single-celled organisms. C. they are eukaryotic organisms. D. they are all photosynthetic. E. they frequently possess cilia or flagella.