顶端优势（apical dominance）

Sweet potato tubers have a phenomenon of apical dominance.  A: 正确 B: 错误

The most significant characteristics of winter branches is that_________are on the branches. A: nodes B: Axillary buds C: an apical bud D: no leaves

The most significant characteristics of summer branches is that________ are on the branches. A: nodes B: leaves C: Axillary buds D: an apical bud

中国大学MOOC: In the epithelial cells of the gut Na+-linked symporters in the apical (absorptive) domain of the plasma membrane and Na+-independent transport proteins in the basolateral domain bring about the ___________________ of absorbed solutes.

In the electron micrograph below, the structure labeled D primarily does which of the following A: Forms a spot weld between cells B: Interacts with actin in the cytoplasm of the apical cytosol C: Facilitates communication between adjacent cells D: Seals membranes between cells E: Moves microvilli