Virulent pathogens are
A. more likely to cause disease.
B. more likely to cause severe disease.
C. unable to cause disease.
D.
more likely to be opportunists.
B
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In examining an unknown animal species during its embryonic development, how can you be sure what you are looking at is a protostome and not a deuterostome?
A) There is evidence of cephalization. B) You see a well-developed coelom. C) The animal is triploblastic. D) The animal is clearly bilaterally symmetrical. E) You see a mouth, but not an anus.
Which of the following organisms exhibits
cephalization? a. snail b. sea anemone c. sea star d. sponge e. Trichoplax
When cells begin to move in the embryo in relation to other cells, this is called
A. growth. B. cleavage. C. morphogenesis. D. fertilization. E. differentiation.
After estimating a probit model to determine the effect of salary offers on whether or not the offer is accepted; Yi* = ?0 + ?1SalaryOfferi + Ui, what would be the marginal effect associated with ?1?
A. The increase in the probability of an offer being accepted from a unit increase in the salary B. The probability of increasing the salary offered C. The probability of accepting an offer D. The increase in salary associated with the offers that were accepted