BIO Questions 41-50 Exam 4 Part. 2

Which of the following terms or phrases is correctly defined or described?

• Dehiscent fruit — a soft fleshy fruit with many seeds.

• Plasmodesmata the fusion of two haploid cells without the fusion of their nuclei

• Biennial plant — a plant that flowers twice in a single year or growing season.

• Companion cell — one of two adjacent cells that form a stomate.

• Pneumatophore — the snorkel-like root of mangroves for root aeration

Which plant cell type is incorrectly matched with its description or function?

• Pericycle cells — give rise to meristems that produce new roots.

• Mesophyll cells leaf cells specialized for photosynthesis

• Guard cells — control the opening & closing of stomatal pores

• Endodermal cells — prevent the loss of water from roots.

• Companion cells — load assimilate into sieve cells.

Which class of plant hormone is incorrectly matched with one of its commercial or agricultural applications.

• Auxins — broad leaf specific herbicide.

• Cytokinins — slows the rate of senescence in cut flowers

• Ethylene stimulate synchronous flowering in pineapple.

• Abscisic Acid— promote stomatal closure to conserve irrigation water.

• Gibberellins — increase the size of seedless grapes.

Phytochrome(s) was discovered in relation to . . .

• dormancy in seeds of fruits.

• opening & closing of stomata

• germination of lettuce seeds.

• flowering in peas & beans.

• photosynthesis in spinach plants

In plant biology, the Münch Pressure Flow Model has been used to help explain

• how atmospheric pressure is sufficient to cause a mass flow of C02 into leaves.

• how guard cells can open & close stomates.

• how assimilate is transported from sources to sinks

• how root pressure can pump water to the tops of the tallest trees.

• how high concentrations of solute can cause plant cells to burst under osmotic pressure

Legumes, such as beans or peas, . . .

• form mycorrhizal associations to increase nitrogen fixation in the soil.

• convert atomospheric N2 to NC)3- before absorbing it.

• form parasitic relationships with other photosynthetic plants.

• form mutualistic associations with nitrogen-fixing bacteria.

• fix N2 from the atmosphere in their leaves

Which of the following statements about water transport in plants is false (or incorrect)?

• The transport of transpirational water in plants is a passive process.

• Water transport relies on covalent bonds between water molecules.

• The net flow of water in a stem is upwards.

• Xylem fibers and parenchyma are generally involved in water transport.

• The cell walls of plants help (or serve as a conduit) to transport water.

In autumn, the amount of   increases, and the amount of ___ decreases in fruits and leaf stalks, causing a

plant to drop leaves and fruit.

• ethylene auxin

• gibberellin . . . auxin

• auxin    ethylene

• gibberellin abscisic acid

• cytokinin abscisic acid