Anonymous‭

I need a planet that is a combination of chlorine world and vitriolic world. The planet is extremely hot and under high pressure, covered in oceans of pure sulfuric acid and a chlorine/fluorine atm...

4 answers  ·  posted 8y ago by Anonymous‭  ·  last activity 8y ago by Anonymous‭

I have wondered what a terrestrial ecosystem would look like dominated by cnidarians and ctenophores rather than insects and tetrapods. In order to fulfill the same niches I imagine they would need...

3 answers  ·  posted 8y ago by Anonymous‭  ·  last activity 8y ago by Anonymous‭

A hypothetical species reproduces by females impregnating males a la seahorses. However, their reproductive system appears woefully ill-suited to this task. Their genitalia are outwardly similar to...

3 answers  ·  posted 8y ago by Anonymous‭  ·  last activity 6y ago by Anonymous‭

So aliens find Earth to be suitable for colonization and disregard humanity's claim. Not because they are racist, but because they are so different biologically and psychologically that humans simp...

19 answers  ·  posted 8y ago by Anonymous‭  ·  last activity 6y ago by Anonymous‭

A hypothetical species is divided into males and females that exhibit pronounced sexual dimorphism. The males are further divided into multiple morphs (e.g. α-male, β-male, γ-male, etc). This po...

5 answers  ·  posted 8y ago by Anonymous‭  ·  last activity 8y ago by Anonymous‭

A hypothetical organism alternates between plant and animal stages over its life cycle. The organism exhibits equally extreme sexual dimorphism. The generations are diplobiontic a la some species ...

2 answers  ·  posted 8y ago by Anonymous‭  ·  last activity 8y ago by Anonymous‭

Humans are derived from arboreal shrew-like animals that survived the cataclysm which wiped out the larger dinosaurs. As far as I am aware this series of events is entirely the result of chance. Wo...

3 answers  ·  posted 8y ago by Anonymous‭  ·  last activity 8y ago by Anonymous‭

A hypothetical organism is tetraploid and isogametous. To reproduce, four haploid gametes must meet and fuse into a tetraploid zygote. Any four individuals are sexually compatible, barring self-inc...

2 answers  ·  posted 7y ago by Anonymous‭  ·  last activity 7y ago by Anonymous‭

This hypothetical marsupial species raises young in a manner loosely similar to seahorses. Only the males have pouches: after gestation the female deposits the fetus into his pouch to compete devel...

5 answers  ·  posted 7y ago by Anonymous‭  ·  last activity 7y ago by Anonymous‭

Biradial symmetry occurs in ctenophores: the body plan consists of two halves which independently display radial symmetry. Spherical symmetry occurs in Volvox algae: any cut through the center of t...

5 answers  ·  posted 7y ago by Anonymous‭  ·  last activity 7y ago by Anonymous‭

Some species which reproduce sexually will replace one sex with (or add) hermaphrodites. The coexistence of males and hermaphrodites is androdioecious, females and hermaphrodites gynodioecious, and...

2 answers  ·  posted 7y ago by Anonymous‭  ·  last activity 7y ago by Anonymous‭

I am trying to figure out the sex-determination of a very foreign form of reproduction. A species has three sexes X, Y, and Z. X produces X gametes, Y produces Y gametes, Z produces Z gametes. The...

13 answers  ·  posted 7y ago by Anonymous‭  ·  last activity 7y ago by Anonymous‭

As far as I have been able to determine, the majority of life reuses the same plumbing for reproductive and digestive/excretory systems. In fact, the anus is believed to be derived from the male go...

4 answers  ·  posted 6y ago by Anonymous‭  ·  last activity 6y ago by Anonymous‭

So I have an alien biosphere in which trisexual reproduction predominates. As far as we can tell, trisexual reproduction does not offer an advantage when it comes to shuffling genes. The biological...

4 answers  ·  posted 6y ago by Anonymous‭  ·  last activity 6y ago by Anonymous‭

While the vampire is a monster of folklore, modern technothrillers (e.g. Federal Vampire and Zombie Agency, Ultraviolet, Blade, Underworld, Daybreakers) have portrayed vampires as humans infected b...

3 answers  ·  posted 8y ago by Anonymous‭  ·  last activity 6y ago by Anonymous‭