Sentences with phrase «larger male organ»

Not exact matches

An elongated shell shape accommodates the male's large sex organs — with larger organs presumably producing more sperm and improving individuals» opportunities for reproductive success, Hunt explains.

Alternatively, using a large vocal organ for roaring may be so effective at deterring rival males that there is no need to invest in large testes,» he said.

In species with the largest vocal organs, males have the smallest testicles, suggesting an evolutionary trade - off between winning mates and making sperm

The tiny male blanket octopus, which possesses a relatively huge copulatory organ, spends it entire life drifting on the ocean in search of a female so large he is no bigger than one of her eyes.

All male spiders have a pair of sex organs called pedipalps, held like two boxing gloves in front of their face, but in this particular daddy - long - legs spider the right pedipalp was twice as large as the left.

Five male and five female mice, homozygous for a temperature - sensitive SV40 large T antigen (ImmortoMice; CBA / ca X C57Bl / 10 hybrid; Charles River Laboratories), were killed by cervical dislocation, and multiple organs were harvested aseptically under a laminar flow hood.

In male turtles, the penis (which is a surprisingly large, black organ with a spade shaped end) may periodically be everted and become visible outside the body.