A.低温处理材料能抑制纺锤体形成,阻止着丝粒被纺锤丝拉断 |
B.洋葱需放入冰箱冷冻室(-18℃)环境下处理一周,等长出1cm的根待用 |
C.卡诺氏液中的作用是固定细胞形态,以利于实验中能观察到完整的细胞 |
D.该实验需通过:解离、漂洗、染色、制片等实验步骤才能用于观察 |
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