Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Question
Transcribed Image Text:Nuptial gift in crickets: duormous are male
Understand the examples of
species with sex-role reversal.
Sex role reversal
In some empid fies, the
operational sex ratio is heavily
female biased, because most
males are off hunting for insect
prey that is used as a nuptial
gift When a male enters the
swarm with a nuptial gift. he may
find females advertising
themselves with unusually large
patterned wings, legs or
abdomen.
Is this always the case?
m
le diaclans
Sex role reversal
Sex role reversal
Pipefish males have a brood pouch in which
females lay their eggs. Provide nutnients and oxygen
for a clutch of eggs for several weeks (male
"pregnancy") Females compete formales. Males
how more interest in feeding thanin mating.
transfers to the female an
spermatophore (-24% of the male's body mass).
Males can only afford to mate orice.
qpa
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