Which of the following occurs during pollination in angiosperms?

a- pollen grains are transferred from the stamen's anther to the pistil's stigma.

b- pollen grains are transferred from the stamen's filament to the pistil's stigma

c- pollen grains are transferred from the pistil's anther to the stamen's stigma.

d- pollen grains are transferred from the stamen's stigma to the pistil's flagment.

Option A.

Explanation:

Stamen is the male part of flower and pistil act as female part.

In angiosperms, during pollination the pollen grains move from stamen's anther that is male part to the pistil's stigma that is female part of the same flower or another flower.

Thus, the correct option is A.

answer:   option a) glucagon was secreted by his pancreas before he ate the cookies because blood glucose was low. insulin was secreted after he ate the cookies because his blood glucose was high.

explanation: