Question

Which of the following is endangered because of the loss of pollinating agents
A. Furbish's lousewort
B. Madagascar rosy periwinkle
C. American chestnut
D. Hawaiian Lobelioids

Answer 1

Hint: The "pollination crisis" that's evident in declines of honeybees and native bees, and in harm to webs of plant-pollinator interaction, is also ameliorated not solely by cultivation of a diversity of crop pollinators, however conjointly by changes in home ground use and agricultural practices, species reintroductions and removals.

Complete step by step solution:
The impregnation of flowering plants by animals represents an essential scheme of service of nice price to humanity, both financial and otherwise.
However, the requirement for active conservation of impregnation interactions is merely currently being appreciated.
Impregnation systems square measure beneath increasing threat from evolution sources, together with fragmentation of home ground, changes in land use, trendy agricultural practices, use of chemicals like pesticides and herbicides, and invasions of non-native plants and animals.
Honey Bees, which themselves square measure non-native pollinators on most continents, and which can hurt native bees and alternative pollinators, square measure nevertheless critically vital for crop impregnation.
Recent declines in Apis mellifera numbers within the US and Europe bring home the importance of healthy impregnation systems, and therefore the ought to additional develop native bees and alternative animals as crop pollinators, and alternative means that. Additionally, ecologists should redouble efforts to review basic aspects of plant-pollinator interactions if best management choices square measure to be created for conservation of those interactions in natural and agricultural ecosystems.

Hence, option D is correct.

Note:
The Hawaiian lobelioids square measure a gaggle of flowering plants within the Campanulaceae|plant family}, Campanulaceae, taxon Lobelioideae, all of that square measure endemic to the Hawaiian Islands. This is often the biggest plant radiation within the Hawaiian Islands, and so the biggest on any island on solid ground, with over a hundred twenty five species. The six genera concerned may be broadly speaking separated supported growth habits.