Two-cell mature pollen consists of a vegetative cell and a germ cell.

Two-cell mature pollen consists of a vegetative cell and a germ cell. A: 正确 B: 错误

Which element is essential for pollen germination? A: Na B: B C: Mo D: Co

Fruit tree radiation mutation breeding often uses pollen as the test material, because it is not easy to produce chimeras.

Which part of roses is finally made into sweet rose cakes? A: honey B: stems C: pollen D: petals

Which of the following particles and atmospheric gases cause mie scattering? ( ) A: water droplets B: smoke C: dust D: pollen

The primary reason for the purchase of the air conditioner is to remove pollen from the air... A: setup B: installation C: selling D: buying

meltblown non-woven fabric 1. essential 2. core raw material 3. filtering layer 4. bacteria 5. pollen 6.

Fruit tree radiation mutation breeding often uses pollen as the test material, because it is not easy to produce chimeras. A: 正确 B: 错误

page 69 2-2 Biology3. pollen A: a common plant disease B: powder from flowers C: early types of flowers D: leaves and stems