Which of the following is not a function of the waxy cuticle that coats plant leaves?Prevents water loss from the leafPrevents fungal spore germination on the leafProtects the leaf from infectionAllows water to be absorbed through the leaf2Which of the following statements about chemical defences in plants is not true?Mint produces antibacterial chemicalsCyanide, produced by some plants, is used in medicinesCitronella is a pest repellent released by lemongrassCaffeine has the ability to kill fungi3Which of these is not a mechanical adaptation in plants to deter herbivores?MimicryDrooping leavesPoisonsThorns4Why do passion flower leaves have spots that mimic butterfly eggs?To prevent fungal spores from germinatingTo prevent pathogens from attacking themTo prevent butterflies from laying their eggs on themTo prevent herbivores from eating them

Most plants' leaves have a cuticle that is waxy. This provides a waterproof barrier. Name one other thing, which could be dangerous to the plant, that the cuticle stops from entering it.

The ______ provide(s) a waxy coating that minimizes water loss from leaves of the plant.

The is a waxy coating that minimizes water loss from the aerial parts of a plant.

The epidermis secretes a waxy coating called the __________________,which keeps water inside the leaf.a) Cortexb) Cambiumc) Epidermisd) Cuticle

The cells of plants are coated with an outer layer called a cuticle that helps protect against water loss, frost, ultraviolet radiation, and damage from insects.  The cuticle primarily consists of a molecule called cutin, which is composed of wax molecules linked together.  These wax precursors of cutins are produced and linked together in the cytoplasm to form functional cutin, which is then exported to the extracellular matrix.Researchers interested in characterizing the proteins involved in transporting cutin to the extracellular matrix created several mutant lines of the plant Arabidopsis thaliana.  Lines with defects in the gene designated dso (which encodes the DSO protein) manifested abnormalities in the cuticle.  The DSO protein is hypothesized to be localized to lipid rafts in the plasma membrane.  To determine how the DSO protein is involved in cuticle formation, cutin was isolated from wild-type and dso-mutant plants and hydrolyzed into its precursor components.  The precursors were then analyzed by gas chromatography and mass spectrometry.  Levels of several classes of cutin precursors were obtained from the cuticles (Table 1).Table 1  Levels of Several Cutin Precursor Classes Found in Wild-Type and dso-Mutant Arabidopsis thaliana CuticlesAdapted from Panikashvili D, Savaldi-Goldstein S, Mandel T, et al. The Arabidopsis DESPERADO/AtWBC11 transporter is required for cutin and wax secretion. Plant Physiol. 2007;145(4):1345-1360. Question 42Based on the hypothesized localization of DSO proteins, the region of the plasma membrane that surrounds DSO is most likely rich in which of the following molecules relative to other plasma membrane regions?A.SterolsB.PhospholipidsC.ProstaglandinsD.Triglycerides