How does the discovery of a past geological event that divided a once-continuous salt marsh in Florida support the tree depicted?
A. It supports the concept of allopatric speciation via vicariance.
B. It does not support the tree depicted because there are six groups, not two.
C. It does not support the tree depicted because the DNA sequence difference between the species is only one percent.
D. It supports the concept of allopatric speciation via dispersal.
Ans: A. It supports the concept of allopatric speciation via vicariance.
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Cinnabar eyes is a sex-linked, recessive characteristic in fruit flies. If a female having cinnabar eyes is crossed with a wild-type male, what percentage of the F1 males will have cinnabar eyes?
A) 0% B) 25% C) 50% D) 100%
The standard error tells
A. how often the examiner made an error. B. how often the experimental variable was tested. C. how uncertain a particular value is. D. the relationship between the control and test groups. E. whether or not the research has been published in a scientific journal.
What is the main difference between plant defense mechanisms that use secondary chemical metabolites versus plant defense mechanisms that use a systemic response?
A. The metabolites can only help in defense against insects, not against other plants. B. The metabolites are toxic to the plants that produce them, the systemic response is safer. C. The metabolites are not as lethal as the systemic response. D. The metabolites are present at all times, and the systemic response must be induced. E. The metabolites are a more reliable way to kill the invader.
Male gamete having a haploid number of chromosomes and the ability to fertilize an egg, the female gamete.
What will be an ideal response?