ANSWER :-
trùng roi là sinh vật đơn bào di chuyển trong nước mà không cần nỗ lực rõ ràng.
Sand dunes are formed from wind movement. There needs to be a large amount of loose sand in an area with hardly any vegetation, enough wind to move grains of sand and some kind of obstacle to make the blowing sand lose its momentum and settle in a new place.
The Cell's Cycle first phase which consists of three stages: G1 phase, S phase, and the G2 phase. The first phase in Interphase in which the cell duplicates organelles and cytosonic components which are metabllicly active. The second stage of Interphase in which DNA replication occur.
<span>Plants don't necessarily need nitrogen to conduct photosynthesis.</span>