AP BIOLOGY

Detailed explanation-1: -Phloem sap travels through perforations called sieve tube plates.

Detailed explanation-2: -In apoplast-loading species, sucrose reaches phloem parenchyma cells through plasmodesmata. Sucrose is loaded and accumulates in the phloem by passing through the apoplast between the PP and the CC.

Detailed explanation-3: -The sugar and other organic molecules are transported through the plant by means of a special layer of tissue called phloem. Phloem is composed of living cells that transport a water solution of sugars that we commonly call sap.

Detailed explanation-4: -The plants then load the sugars from the leaves into the phloem in preparation for transport to other areas of the plant. Phloem are tissues that look like tubes. They transport sugars throughout the plant and supply it to tissues like roots, flowers and fruits that depend on this sugar to grow.

Detailed explanation-5: -Translocation: Transport from Source to Sink. Photosynthates are produced in the mesophyll cells of photosynthesizing leaves. From there, they are translocated through the phloem where they are used or stored. Mesophyll cells are connected by cytoplasmic channels called plasmodesmata.