The drug diethylstylbestrol, or DES, mimics estrogen and interferes with the development of the fetal uterus. What is this drug considered?
A) a hormone
B) as good as estrogen
C) an endocrine disruptor
D) a good form of birth control
C
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Why do we seldom see more than three consumer levels in natural systems?
1.There is not enough energy to support additional levels. 2.Animals haven’t evolved to feed on animals at the third level. 3.Humans take over the role of the fourth-level consumer. 4.There isn’t enough habitat for a fourth level.
You are studying a newly discovered fungus and find an area of a hyphae that contains cells with two nuclei. You should classify these cells as diploid.
Answer the following statement true (T) or false (F)
How is pneumonic plague transmitted?
A. inhalation of respiratory aerosols from a person infected with Yersinia pestis B. bite of a flea carrying Yersinia pestis C. fomite contact D. contact with the blood of a person infected with Yersinia pestis E. bite of a tick carrying Yersinia pestis
Select all the statements that accurately reflect drugs targeting the cell membrane. Select All That Apply
What will be an ideal response?