seed dispersal (3rd edition) - part 3 of 18. a visual report on the different types of seed coats shows how external agents help each kind become dispersed. we see seeds with wings, seeds easily borne by the wind, seeds with projections that hook onto pa - 蘋果心 個影片檔及 b 捲影像00:30
ornament fractals of cubes and digital ico spheres connected in the rotating blockchain of information - 蘋果心 個影片檔及 b 捲影像00:08
hand holding digital cube concept of blockchain and fintech technology background - 蘋果心 個影片檔及 b 捲影像00:08
what do they eat? - part 2 of 8. shows how animals depend on plants and other animals and insects in an environmental system of eating and being eaten. an apple core discarded by a boy becomes food for ants; man, who eats animal meat, become food himself - 蘋果心 個影片檔及 b 捲影像00:31
what do they eat? - part 1 of 8. shows how animals depend on plants and other animals and insects in an environmental system of eating and being eaten. an apple core discarded by a boy becomes food for ants; man, who eats animal meat, become food himself - 蘋果心 個影片檔及 b 捲影像00:31毛蟲
learning about flowers - part 14 of 18. introduces children to a variety of flowering plants and shows flower petals opening and closing. explains that a vital function in a plant's life cycle is to produce seeds - 蘋果心 個影片檔及 b 捲影像00:36
floor and cement beam drilling machine for residential commercial buildings, construction equipment - 蘋果心 個影片檔及 b 捲影像00:24
ornament fractals of cubes and digital ico spheres connected in the rotating blockchain of information - 蘋果心 個影片檔及 b 捲影像00:08
hand holding digital glass cube concept of exchange money and technology background - 蘋果心 個影片檔及 b 捲影像00:08
ornament fractals of cubes and digital ico spheres connected in the rotating blockchain of information - 蘋果心 個影片檔及 b 捲影像00:08
