seed dispersal (3rd edition) - part 6 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 - 乳草 個影片檔及 b 捲影像00:31
seed dispersal (2nd edition) - part 2 of 18. considers various means by which seeds are disseminated; how they anchor themselves to the ground to facilitate germination; and how they protect themselves. demonstrates the dispersal of seed plants by wind, t - 乳草 個影片檔及 b 捲影像00:36
seed dispersal (2nd edition) - part 1 of 18. considers various means by which seeds are disseminated; how they anchor themselves to the ground to facilitate germination; and how they protect themselves. demonstrates the dispersal of seed plants by wind, t - 乳草 個影片檔及 b 捲影像00:33
learning about seeds - part 19 of 19. explains that seed-bearing plants are of many types, many sizes, shapes, colors. time-lapse photography shows how seeds grow and what they need for growth. seed dispersal is also illustrated - 乳草 個影片檔及 b 捲影像00:33
vadnais heights, minnesota, a frantic monarch butterfly caterpillar, danaus plexippus. climbing on a milkweed leaf. - 乳草 個影片檔及 b 捲影像00:35
little canada, minnesota, gervais park. a pair of bristle flies chasing each other around while mating on milkweed plant. - 乳草 個影片檔及 b 捲影像00:17
little canada, minnesota, gervais park. a pair of bristle flies chasing each other around while mating on milkweed plant. - 乳草 個影片檔及 b 捲影像00:23
the farm family in autumn - part 16 of 26. autumn is generally harvest time on the farm - the fulfillment of what began the previous spring. as the days grow shorter and colder, the crops are gathered and either stored or shipped. it is a busy time on the - 乳草 個影片檔及 b 捲影像00:37
red milkweed beetles mating on a milkweed plant in toronto, ontario, canada, on june 24, 2022. - 乳草 個影片檔及 b 捲影像00:10
monarch butterfly caterpillar on a milkweed plant in markham, ontario, canada, on june 26, 2022. - 乳草 個影片檔及 b 捲影像00:10毛蟲
monarch butterfly caterpillar on a milkweed plant in markham, ontario, canada, on june 26, 2022. - 乳草 個影片檔及 b 捲影像00:10
vadnais heights, minnesota. great black wasp, sphex pensylvanicus feeding on swamp milkweed. - 乳草 個影片檔及 b 捲影像00:17
vadnais heights, minnesota. great black wasp, sphex pensylvanicus feeding on swamp milkweed. - 乳草 個影片檔及 b 捲影像00:15
vadnais heights, minnesota. great black wasp, sphex pensylvanicus feeding on swamp milkweed. - 乳草 個影片檔及 b 捲影像00:13
little canada, minnesota. gervais park. a pair of multicolored asian lady beetles, harmonia axyridis, mating on milkweed leaf with aphids. - 乳草 個影片檔及 b 捲影像00:10
little canada, minnesota. gervais park. three multicolored asian lady beetles, harmonia axyridis, trying to mate on milkweed leaf. - 乳草 個影片檔及 b 捲影像00:14昆蟲
little canada, minnesota. gervais park. a pair of multicolored asian lady beetles, harmonia axyridis, mating on milkweed leaf with aphids. - 乳草 個影片檔及 b 捲影像00:08
with the monarch species of butterfly http://www.newsweek.com/monarch-butterflies-have-declined-90-conservationists-seek-extra-protection-267094 in... - 乳草 個影片檔及 b 捲影像05:01
western tiger swallowtail butterflies feeds on milkweed flowers littleton colorado - 乳草 個影片檔及 b 捲影像00:19
western tiger swallowtail butterfly feeds on milkweed flowers littleton colorado - 乳草 個影片檔及 b 捲影像00:13蝴蝶
broad-tailed hummingbird hovers slow motion feeds on milkweed flowers littleton colorado - 乳草 個影片檔及 b 捲影像00:16
broad-tailed hummingbird hovers slow motion feeds on milkweed flowers littleton colorado - 乳草 個影片檔及 b 捲影像00:16
broad-tailed hummingbird hovers slow motion feeds on milkweed flowers littleton colorado - 乳草 個影片檔及 b 捲影像00:16
chicago, il, u.s. - dandelion, milkweed and rape in a field with geese on thursday, may 7, 2020. - 乳草 個影片檔及 b 捲影像00:46
milkweed seeds scattering in the wind / eomjeong-myeon, chungju-si, chungcheongbuk-do, south korea - 乳草 個影片檔及 b 捲影像00:30
