A. The pith contains parenchyma and mucilage ducts. b.The cortex contains collenchyma and parenchyma. c. The xylem is located outside the phloem. d.The epidermis is a single layer of cells. e.The vascular bundles are separated by interfascicular parenchyma.

The question is incomplete and the complete question is

Which is false about the Tilia stem?

C) The xylem is located outside the phloem

Explanation:

Tilia americana is a tree which grows in the climate of Eastern America. The tree is dicotyledonous and therefore posses secondary growth.

The anatomy of the stem of the Tilia plant shows that the:

1. Pith- the pith is the central portion of the stem which is composed of the parenchymatous cells. The pith also contains the mucilage ducts.

2. Cortex- the cortex is the portion present inside the epidermal layer which is made of both the chloroplast containing cells called collenchyma cells and the parenchyma.

3. Epidermis- The outermost layer which is composed of the single layer of cells.

4. Vascular bundle- Since the phloem is located inside the xylem and not xylem is inside the phloem therefore in the given is the false statement.

Thus, Option-C is correct.

each of the 46 original chromosomes splits into two daughter chromosomes, so there are two sets of 46 daughter chromosomes that end up in each cell. human cells have 46 chromosomes. each chromosome consists of a pair of identical chromatids attached together by a structure called a centromere.

the real answer is b. scintillation counter