Which of the following substances are common allergens?
a. Fungal spores
b. Dust mites
c. All of these choices
d. Pollen
e. Bees
c
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A cross is done between parents with genotypes aaBbCc and aaBbcc. What is the probability that
offspring will have the same phenotype as the first parent? Assume that capital letters indicate dominant alleles and lower case letters indicate recessive alleles.
a. 1/8 b. 1/4 c. 3/8 d. 3/16 e. 9/16
Which of the following is incorrect about plan
B contraception?
a. it is used after intercourse has taken place b. it is only available with a prescription for women over 17 c. it delivers a large dose of progesterone d. it prevents ovulation e. all of these are correct about plan B
In which of the following regions has human conversion of natural ecosystems to other uses resulted in severe erosion of soil by wind or water?
A) prairies of North America B) forests of the Amazon Basin C) forests of Queensland, Australia D) all of the above
________ are complex communities of various types of microbes that adhere to surfaces
A) Aggregates B) Colonies C) Isolates D) Biofilms E) Media