Infection always leads to disease
Indicate whether this statement is true or false.
FALSE
You might also like to view...
In birds and butterflies, males contain ____ sex chromosomes and females contain ____ sex chromosomes
a. XY; XX b. ZZ; ZW c. ZY; XW
d. XX; XY e. ZW; ZZ
Inbreeding is primarily due to ____
a. gene flow b. nonrandom mating c. neutral mutations d. natural selection e. adaptive radiation
Eggs have receptors that recognize surface proteins on sperm of their own species. This illustrates ____
a. behavioral isolation b. gametic isolation c. hybrid breakdown d. hybrid inviability e. hybrid sterility
Impressive was a champion Quarter Horse stallion with a magnificent muscular physique, a trait that he passed on to dozens of offspring. However, many of Impressive's offspring developed periodic muscular twitching that sometimes left the horses temporarily unable to move. Some horses even died. As it turns out, Impressive's award-winning physique was due to a mutation in a single, protein-encoding gene, resulting in hyperexcitable muscle (which contracts even in the absence of a stimulus from its motor neuron). Which is not a plausible explanation for the identity of the abnormal muscle protein in Impressive and his offspring?
A. Overactive troponin molecules B. Acetylcholine receptors that function in the absence of acetylcholine C. Tropomyosin that is unable to bind to actin D. Leaky Na+ channels E. Overactive Ca2+ pumps in the membrane of the sarcoplasmic reticulum