Parthenogenesis, a form of asexual reproduction in which an egg develops in the absence of fertilisation, has traditionally been associated with invertebrates. However, recent discoveries have ...

The study revealed unexpected and sex-specific effects of germline regulation on longevity and somatic repair in vertebrates. Contrary to classical evolutionary theories, it turns out that changing ...

What really did come first--the chicken or the egg? Birds' reproductive biology is dramatically different from that of any other living vertebrates, and ornithologists and paleontologists have long ...

Sex is a tricky business, evolutionarily speaking. One problem is that sexually reproducing organisms must suffer the considerable faff of securing a mate (for the males of some species, the struggle ...

2.2.2. Biotic factors in ESD -- 2.2.3. Mechanisms underlying ESD -- 2.2.3.1. Stress-mediated regulation of ESD -- 2.2.3.2. Epigenetic regulation of ESD -- 2.3. Polygenic sex determination -- 3. Sexual ...

Asexual reproduction is common for animals like starfish, deep-sea worms, and stick insects, but among vertebrates, it’s a rarity. A process called parthenogenesis allows some female animals to ...

Some recent studies of the evolution of sexual behavior / N. Tinbergen -- The evolutionary importance of sexual processes and of sexual behavior / W.E. Caspari -- Coaction of genetical and ...

Scientists have found the first instance of melatonin directly acting on a neuropeptide in the vertebrate brain, they reported February 7 online in PNAS. "This suggests if melatonin can do this on one ...

This is a preview. Log in through your library . Abstract Age-specific survival and reproduction are closely linked to fitness and therefore subject to strong selection that typically limits their ...

LONDON (Reuters) - Sex has been a fact of life for at least 380 million years, longer than previously thought. Internal fertilization was widespread among prehistoric fish living on ancient tropical ...