Humans have selectively bred many radically different domestic animals (e.g., St. Bernard and Chihuahua dog breeds). Does this activity result in evolution? Why or why not?
What will be an ideal response?
Artificial selection forces the change in allele frequency. Because this is not an environmentally imposed condition that led to the development of a new breed.
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Prosthecae are an adaptation for
A) anaerobic growth. B) cell differentiation under harsh conditions. C) nitrogen fixation. D) low nutrient aquatic environments.
Which of the following is properly matched?
a. compact bone tissue; light weight b. spongy bone; matrix of dense concentric rings c. red marrow; mostly fat d. yellow marrow; major site of blood cell formation e. none of these
Imagine that you are a detective who has identified a potential suspect in a homicide. You acquire a small amount of blood from the crime scene and hand it over to your lab. The lab carries out PCR for one polymorphism, and it returns as a match to your suspect. Is this enough to arrest your suspect?
A. Yes, these data definitively prove that your suspect was at the crime scene. B. Yes, the chance that your suspect will have the same polymorphism as a drop of blood from a random individual is about 1 in 50,000?this is enough to arrest the suspect. C. No, your lab should assess additional polymorphisms?a single polymorphism does not constitute a genetic fingerprint. D. No, the small amount of blood you acquired from the crime scene will not provide enough genetic material for PCR to be carried out efficiently?more than a single drop of blood is needed to provide enough raw material for analysis.
The most common spatial distribution among individuals within a population is clumped
Indicate whether the statement is true or false