About half of all flowering plant species, including many important crop plants, belong to which category of chromosomes?
a. euploids
b. haploids
c. aneuploids
d. polyploids
Answer: d. polyploids
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Which of the following is a way in which bacteria help the environment?
A. They are used to clean water in sewage treatment facilities. B. They remove pollutants from the environment. C. They break down dead organisms in the soil and recycle nutrients. D. All of the above are ways in which bacteria help the environment.
All of the microbes in the human body are collectively called the:
A) viruses B) human genome C) microbiome D) biofilm E) none of the above
Diagnosis of syphilis is usually made by
A) the MHA-TP test. B) culturing specimens on laboratory media. C) microscopic evaluation of stained specimens. D) DNA probes. E) a Pap smear.
As world travel becomes easier and human populations intermix, the occurrence of what phenomenon will probably decrease?
A) sexual selection B) founder effect and genetic drift C) immigration D) mutation Refer to the scenario below, and then answer the following question(s). Two European men and two Polynesian women settled on a previously uninhabited tropical island. All four of the settlers have brown eyes, a dominant trait, but one of the Europeans is heterozygous and carries the recessive gene for blue eyes.