Chemical signals such as __________ have roles in
social communication. Fill in the blank(s) with the appropriate word(s).
Answer: pheromones
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The bacterium that causes botulism disease is harmless until it:
a. is infected by lytic bacteria. b. is infected by certain retroviruses. c. contains a certain prophage DNA. d. is irradiated by UV radiation. e. is infected by prions
A pyrimidine is a double-ring molecule
__________________ Indicate whether the statement is true or false.
An owl and a hawk both eat mice. Which of these terms describes the relationship between a hawk and an owl?
A) predation B) competition C) parasitism D) herbivory E) mutualism
Microsatellites are short sequences of DNA that consist of several two- or three- nucleotide motifs repeated in tandem (e.g., AATAATAAT or GAGAGAGAGAGA). Each allele consists of a different number of repeats. Microsatellites are typically not under selection, and they are inherited through Mendelian inheritance. Given this information, which of the following questions might you answer with the use of microsatellites?
A) whether a gene is dominant or recessive B) whether your child will be blonde- or brown-haired C) whether two puppies were sired by the same father D) whether your canary died of a viral or bacterial infection E) whether a human fetus is male or female