Infants born to asymptomatic mothers with recurrent genital herpes are less likely to acquire herpesvirus at birth than infants born to newly infected mothers because
A) maternal antibodies offer protection.
B) the disease cannot be transmitted to newborns.
C) the disease is not communicable.
D) prophylactic antibiotics are administered to the newborn.
E) the virus is not growing.
A
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The most heavily colonized human organ by bacteria is the ________, containing 1011-1012 bacterial cells per g
A) mouth B) small intestine C) large intestine D) skin
A recombinant phenotype is ____
a. a different combination of the traits seen in either parent b. identical to the traits seen in both parents c. an expression of dominant traits only d. an expression of recessive traits only e. the result of crossing two homozygous dominant individuals
To investigate the role of cadherin in early development, you continuously treat frog zygotes with antibodies that bind EP-cadherin. You most likely would find that
A) cell division stops but the existing cells organize to form a small, properly organized blastula. B) the cells associate only loosely and fail to form a properly organized blastula. C) the cells associate only loosely but skip the blastula stage to develop into a normal frog. D) the cells divide uncontrollably and form a large tumor-like mass. E) blastula formation and subsequent development proceed normally.
Mycorrhizal association with plant roots is best described as
A. a symbiotic relationship between the plant and certain bacteria. B. detrimental to the roots. C. a fungus root interrelationship. D. a kind of fungal parasite on plant roots. E. only a temporary association dependent on water uptake.