Review test

Which facts contradict the classical view that sexual reproduction in alpine plants is of reduced importance?

Why, in the long run, is vegetative reproduction not an alternative to sexual reproduction in plants?

Which pollinator group becomes most frequent at highest altitudes?

Why are bumblebees of particular relevance for the pollination of alpine plants?

How do alpine plants compensate low pollination visiting rates?

What has been called a "pollen risk strategy"?

Why is seed set constrained by low temperature?

Why does life history theory predict a seed size vs. seed number "trade off"?

Why are alpine seeds better dispersed by wind than seeds in the lowland?

Why are "safe sites" of particular relevance for the establishment of seeds in alpine habitats?