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Results tagged with development
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user 4579
The process through which a biological organism grows to maturity. In certain contexts it can mean the changes the organism goes through over its entire lifetime.
8
votes
Are fish and reptilian scales homologous?
No, fish scales are dermal (= formed in derma) bones like skull roof bones. Scales in reptiles are formed by epidermis and are made primarily of protein (from keratinocytes), being similar in derivati …
- 3,209
6
votes
Accepted
Why is Portuguese man o' war considered a colony?
Physalia and Siphonophorans in general are multicellular Metazoans.
But the whole discussion is about modularity on the level of individuals: Siphonophorans are colonial organisms, which means they a …
- 3,209
1
vote
Drosophila melanogaster eclosion
Although I found this study, where mean and 95% CIs of median time to
eclosion (h) are provided for some strains of D.m. (with a resolution of 12 h) (in table 3), the moment of eclosion seems to be un …
- 3,209
1
vote
Accepted
When is wing growth in the bat complete and how soon can bats fly after wing growth is compl...
The ability of the forelimbs in bats (as well as in other tetrapods) to grow depends on the proliferation activity and ossification of cartilage in growing zones of the bones. Adult bats do not grow …
- 3,209
1
vote
Primary cilia: what cell types have non-motile cilia that migrate?
One example is the development of ependymal cells in brain ventricules: They are multiciliated and the cilia are motile, but ciliogenesis starts from a single cilium, which is not motile and which migrates …
- 3,209
2
votes
How animals maintain their body shape after development to maturity?
Normally, cells do not proliferate without a "command". The "zones of genetic activity" you mentioned are defined by gradients of morphogenic molecules (and cell interactions). In the adult organism t …
- 3,209