What Are the Symptoms of Erectile Disorder

question 25

Multiple Choice

What are the symptoms of erectile disorder?

• A) Unintentional ejaculation either during foreplay, during penetration, or soon after intercourse begins
• B) A delay or absence of orgasm following a normal phase of sexual excitement
• C) Ejaculation is impossible or occurs only after strenuous efforts
• D) A persistent inability to obtain or maintain an erection sufficient for satisfactory sexual performance

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Definitions:

Molecular Clock

A method used to determine time based on base pair substitutions. Molecular clocks use the rates of molecular change to deduce the divergence time between lineages in a phylogeny, for example. They work best when they can be “calibrated” with other markers of time, such as fossils with known ages and placements.

Synapomorphy

A trait that is shared by two or more taxa and their most recent common ancestor, used to infer evolutionary relationships.

Phylogenetic Methods

Techniques used in biology to infer the evolutionary relationships and history among different species or genes.

Partner-Partner Transmission

The spread of a pathogen or disease between individuals in a close relationship, typically referring to sexually transmitted infections.