PratChp23&23

Which of the following is INCORRECTLY paired?

• stem -- supports the leaves

• roots -- absorb nutrients

• node -- point at which leaves attach to stem

• adventitious roots -- grow laterally from a tap root

As plants growth in girth and height, the thickening of the stem occurs at the ____ and is an example of ____ growth.

• lateral meristem, secondary

• apical meristem, primary

• intercalary meristem, primary

• apical meristem, secondary

Which of the following ground tissues are dead at maturity and often contain lignin?

• parenchyma

• collenchyma

• sclerenchyma

• xylem

Which of the following is FALSE about xylem?

• transports water and dissolved minerals from the roots

• has tracheids and vessel elements

• type of vascular tissue

• cells are alive at maturity but lack nuclei

The outermost, waxy layer that protects plants from water loss and predators is called the ____ and is produced by the ____.

• cuticle, epidermis

• epidermis, lateral meristem

• stomata, apical meristem

• sapwood, lateral meristem

What are the cells that control the opening and closing of stomata?

• tracheids

• guard cells

• sclereids

• sieve plates

Which structure(s) regulate(s) water loss in plants?

• guard cells

• epidermis

• stomata

• both (a) and (b)

• both (a) and (c)

What is the difference between a macronutrient and a micronutrient?

• size of the atoms

• amount required by the plant

• use by multicellular (macro-organisms) versus microorganisms

• source of the nutrient

Which soil layer is most important for supporting plant growth?

• A horizon

• B horizon

• C horizon

• both (b) and (c)

How do nitrogen-fixing bacteria contribute to the nitrogen cycle?

• decompose dead plant material, releasing N2

• convert NH4 + to N2 for release into the atmosphere

• reduce N2 to NH4 + for use by plants

• release N2 from root nodules