[坎贝尔生物学 第816页] Campbell Biology 12th Edition
▼ Figure 35.11 VISUALIZING PRIMARY AND SECONDARY GROWTH All vascular plants have primary growth: growth in length. Woody plants also have secondary growth: grow
▼ Figure 35.11 VISUALIZING PRIMARY AND SECONDARY GROWTH All vascular plants have primary growth: growth in length. Woody plants also have secondary growth: grow