QUESTION 1 What is the waxy barrier that forces water and nutrients in the soil

Question

QUESTION 1 What is the waxy barrier that forces water and nutrients in the soil to go though cell membranes, instead of simply being absorbed directly into the xylem of roots? guard cells cortex cuticle endodermis epidermis Casparian strip QUESTION 2 How do roots obtain cation fertilizers (positively charged nutrients) from the soil? Root hairs release H+ ions that displace the cation nutrients. Root hairs wrap around soil particles and absorb nutrients directly Root cells use active transport to remove cations from soil particles. Epidermis cells on roots have a negative charge that pulls in positive cations.

Explanation / Answer

Q. 1 answer is Caperian strip

As Casparian strip is a waterproof zone; water can't diffuse through these cells, this leads to loss of roots pressure required to force water through the vascular cylinder and into the xylem.

Q.2. Answer is C

As

Therefore, the positively charged nutrient ions diffuse from the surface of clays in the soil aggregates to the surface of the root. For the essential nutrients that have a positive electrical charge when dissolved in the soil water, the major mechanism of nutrient movement to the root surface is the very slow process of diffusion.

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