The three most common atoms in the human body
are
a. hydrogen, oxygen, and carbon.
b. carbon, hydrogen, and nitrogen.
c. carbon, nitrogen, and oxygen.
d. nitrogen, hydrogen, and oxygen.
e. carbon, oxygen, and sulfur.
Answer: a
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Which of the following kinds of fungi are categorized as ascomycetes? Check all that apply.
_____ cup fungi _____ yeasts _____ morels _____ truffles _____ bread mold
Which of the following statements is false?
a. The best option for a vaccine against AIDS may be an engineered virus. b. HIV genes mutate faster than the immune system can form antibodies against their products. c. Home test kits are as accurate as those used in clinics d. It is very difficult to form a vaccine against all the mutated forms of HIV. e. The prevention of the spread of HIV currently depends upon implementing behavioral controls through education.
In garden peas, one pair of alleles controls the height of the plant, and a second pair of alleles controls flower color. The allele for tall (D) is dominant to the allele for dwarf (d), and the allele for purple (P) is dominant to the allele for white (p). A tall plant with purple flowers crossed with a tall plant with purple flowers produces 3/4 tall purple and 1/4 tall white. What is the genotype of the parents?
A. Dd Pp x Dd pp B. Dd Pp x DD Pp C. DD Pp x dd Pp D. Dd pp x dd Pp E. DD Pp x dd pp
Koch's postulates are criteria used to establish that
A) A specific microbe should be classified in a specific kingdom B) A specific microbe is the cause of a specific disease C) Microbes can be used to clean up toxic spills D) Microbes are found on dust particles E) Life-forms can only arise from preexisting life-forms