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Photography with cameras
Nikon D3x, Nikon D300, Canon 50D
Image editing with Photoshop |
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Keyword: Tube |
Overview - a b c d e f g h i j k l m n o p q r s t u v w x y z | |
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| Pollen | ...rounded by the intine. The outer layer of the intine has a high pectin content, which allows easier detachment of the exine. The inner intine consists mainly of fibrils (cellulose). When the pollen grain germinates, the intine develops into a pollen tube.
The exine has two-layers and consists mainly of sporopollenin. The structure is determined by the pollen grain. Pollen grains vary in size, shape and surface structure, so that it is possible to identify what plant genus and species they come f...
...ible to identify what plant genus and species they come from. Pollen grains reach average sizes of between 10 and 100 microns. They have one or more apertures, which lack the outer layer of the exine so that the intine can grow through into a pollen tube.
Pollen grains are usually spread singly (monads) but may also be released into the air in groups of two or four (dyads or tetrads). Pollenkitt is capable of holding pollen grains together in groups. This can also be done with sticky threads of... | | |
| | The female drone flies lay their eggs in sewage treatment plants and other muddy or foul waters. The larvae have a breathing tube, which is up to 100 mm in length. Therefore they are known as rat-tailed maggots. The larvae of drone flies develop to a body length of up to 20 mm. Due to the fact that they filter feculent particles from the water, they contribute to the clari... | | |
| | | Murky-legged Black Legionnaire | | ... and tapered at the end. They have leathery skin, which is strengthened like a shield in the course of their development in limestone deposits. This also protects them against dehydration. At the end of their abdomen are the remains? of a breathing tube which was not used and is therefore atrophied. The larvae have respiratory openings (stigma/spiracles) which are always open. On the chest (prothorax) the respiratory openings are very big in size. The larvae overwinter. They pupate in spring, in... | | |
| | ...the large compound eyes and easily recognizable simple eyes. The threadlike antennae are about 4 mm long, yellowish-brown in colour and have club-thicked outer limbs. The mandibles are strongly developed. In the area of the mouth opening there are 2 tube-like appendages, which are used to eat. | | |
| | ... a nuisance by humans. The larvae are social and feed on rotting waste materials. They are found under bark, in dead wood, fungi or feces, according to what species they are. Some species live as guests with ants. The larvae breathe with the help of tube-like elongated openings. At the end of the last larval stage, the larvae pupate inside their outer skin. Within the chrysalis, the Scatopsidae breathe through tubes, which branch off from the thorax. | | |
| | The females dig tube-like tunnels for their eggs, into the ground in sandy slopes, roads, embankments, or even in the sandy joints between sidewalk slabs. The tunnels are 1 - 1. 5 metres in length. At the end are 5 - 7 (sometimes even more) chambers the size of pigeon e... | | |
| | ... stagnant water which is often very muddy. Here, the oxygen content of the water plays a decisive role, as egg-laying can even take place in cesspools. From these eggs the so-called "rat-tailed maggots" hatch – larvae with a long breathing tube attached to the abdomen that extends up to the surface of the water. The larvae feed on decaying organic matter and thus make an important contribution to water clarification. | | |
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| Frequent Queries: | | threadlike pollin lacks exine mosquitoes (1) | | | | | | |
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