It's your birthday and you splurge with a big slice of chocolate cake, heavy on the icing. Shortly afterwards, your blood glucose levels rise until an endocrine mechanism (secretion of insulin) counteracts this rise and glucose levels decline. The initial change in blood glucose and insulin response that follows is an example of
A. physiological constancy.
B. diffusion.
C. homeostasis.
D. positive feedback.
E. lack of homeostasis.
C. homeostasis.
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In establishing paternity by DNA fingerprinting, what proportion of microsatellite repeat alleles in a child come from the father?
A) only those on the X chromosome B) 1/4 C) 1/2 D) 3/4
Polyplacophora, Gastropoda, Bivalvia, and Cephalopoda are all lineages within the phylum ____
a. Rotifera b. Mollusca c. Platyhelminthes d. Annelida e. Nemertea
Rubisco has 16 subunits joined together to make a functional unit. Eight of the subunits are large, the
other 8 are small. What is the function of the small subunit?
a. The small subunits contain the reactant binding sites. b. It stabilizes the overall enzyme's structure but has no function by itself. c. The function of the small subunit is still unknown. d. It regulates the enzyme's rate of catalysis. e. The small subunits contain allosteric regulator binding sites.
Which cell structure physically moves the cell's chromosomes?
A) the mitotic spindle B) the cell wall C) the plasma membrane D) the contractile ring