A.MS培养基的碳源一般用蔗糖而不用葡萄糖,以减少微生物污染 |
B.MS培养基、NAA溶液、6-BA溶液均可配制成母液,以减少称量的误差 |
C.接种时用镊子夹取菊花茎段,注意茎段的形态学上下端,避免倒插 |
D.定植前可先将试管苗移栽到装有蛭石的育苗盘中,因为蛭石含丰富的有机质 |
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2