Which statement concerning grafting is correct?a. Stocks and scions refer to twigs of different species.b. Stocks and scions must come from unrelated species.c. Stocks provide root systems for grafting.d. Grafting creates new species.

Most of the growth of a plant body is the result ofa. cell differentiation.b. morphogenesis.c. cell division.d.cell elongation.

Heartwood and sapwood consist ofa. bark.b. periderm.c. secondary xylem.d. secondary phloem.

How are Okazaki fragments synthesized?a. by using the leading-strand template, and synthesizing 5'→3'b. by using the leading-strand template, and synthesizing 3'→5'c. by using the lagging-strand template, and synthesizing 5'→3'd. by using the lagging-strand template, and synthesizing

Which statement best characterizes primary growth?a. It does not occur in roots, only in shoots.b. It leads to the development of cork tissue.c. It produces the dermal, ground, and vascular tissues.d. It produces rings of xylem, phloem, and cork tissue.

The phase change of an apical meristem from the juvenile to the mature vegetative phase is often revealed bya. a change in the morphology of the leaves produced.b. the initiation of secondary growth.c. the formation of lateral roots.d. the activation of floral meristem identity genes.

Telomerase synthesizes DNA in the direction.

Which statement best characterizes secondary growth?a. It results from cell divisions in the vascular and cork cambia.b. It increases the length of the plant stem.c. It results from divisions in the apical meristem cells.d. It often produces phloem cells to the inside and xylem cells to the outside of the vascular cambium.

The vascular cambium gives rise to (A) all xylem. (B) all phloem. (C) primary xylem and phloem. (D) secondary xylem and phloem