In What Way Are Monotremes Similar to More Ancestral Chordate

question 21

Multiple Choice

In what way are monotremes similar to more ancestral chordate lineages, as opposed to more recently evolved mammals?

• A) Monotremes perform little parental care; other mammals use lactation to feed offspring.
• B) Monotremes exchange gases through their skin; other mammals use lungs.
• C) Monotremes lay eggs; other mammals bear live young.
• D) Monotremes do not have jaws; other mammals do.
• E) Monotremes perform external fertilization; other mammals perform internal fertilization.

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Definitions:

Epistatic Gene

A gene that can interfere with or mask the expression of other genes, affecting their phenotypic outcomes.

Affects

Refers to emotions or feelings that influence an individual's behavior and perceptions.

Expression

In genetics, the process by which information from a gene is used to synthesize a functional product, such as protein, leading to the manifestation of a phenotype.

Pleiotropy

A genetic phenomenon where a single gene influences multiple phenotypic traits in an organism.