This is known as a raphe, and is involved in gliding movements made by diatom cells; motile diatoms always possess a raphe.
It is used as a carbohydrate food reserve in the same way that chrysolaminarin is used by phytoplankton, especially in diatoms.
In botany and planktology it is commonly used when describing a seam or ridge on diatoms or seeds.
These sand grains rupture diatoms and other algal cells during digestion.
The larvae are aquatic, feeding on diatoms and algae.
Following this the castle was threatened by encroaching dunes.
Marshes formed and were overlain by sand, gravel and by sand dunes which formed natural barriers to tướng the sea.
In 1944, the dune that the house sat on began to tướng hollow out, forcing another move.
The best habitats for the butterflies are coastal salt spray meadows, montane meadows, and stabilized dunes.
In the game, you play a smuggler who has a number of different vehicles at his disposal including dune buggies, rally cars, and military vehicles.
More chevron_right
Flash flooding and quicksand in the gorge repeatedly caused problems, with equipment and materials apparently disappearing overnight.
The marshland is said to tướng hide a quicksand pit to tướng which an early 20th-century farmer once lost a horse.
Sometimes the rails sunk under the swamp, and cars were lost in the quicksand.
Cities seldom have quicksand beds, so sánh he created his own one.
His powers revolve around earth, he is able to tướng create quicksand and minor earthquakes.