Animal Diversity Barnacle Paper

Question 1

For their size, barnacles possess the…

Answer 1

Longest penis of any animal (up to eight times their body length)

Question 2

They are one of few … animals to copulate

Answer 2

Sessile

Question 3

Male barnacles face a trade off between…

Answer 3

Reaching more mates and controlling ever-longer penises in turbulent flow

Question 4

Which species does this paper look at?

Answer 4

Balanus glandula

Question 5

The study found that barnacles from …-… shores had … and … and more massive (for their length) penises than those from … …

Answer 5

Wave-exposed, shorter, stouter, protected bays

Question 6

Penis shape variation was tightly correlated with…

Answer 6

Maximum velocity of breaking waves and on all shores larger barnacles has disproportionately stouter penises

Question 7

Larger barnacles had disproportionately… penises

Answer 7

Stouter

Question 8

Most of this variation was due to…

Answer 8

Phenotypic plasticity

(Barnacles transplanted Tina wave-exposed outer coast produces dramatically shorter and wider penises than counterparts moved to a protected harbour

Question 9

This phenotypic plasticity has probably evolved due to the…

Answer 9

ever-changing and variable wave conditions on rocky shores

Question 10

This study is evidence that factors other than the usual drivers of genital diversification: … …, … … and …-… competition - can influence genital form

Answer 10

female choice, sexual conflict, male-male