Question

D. Give one significant function of the following:
1. Epithelial tissue
3. Seed coat
2. Petals
4. Radicle
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Answer 1

Answer:

1. it include secretion, absorption etc.

2. it protect seed from loss of water etc.

3. it consist a bright colour which attract insect toward cross pollination.

4. it kills intracellular bacteria.

Explanation:

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Answer 2

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$\sim$$\huge\underline\mathcal {Epithelial Tissues}$

$\implies$Epithelial tissues are widespread throughout the body. They form the covering of all body surfaces, line body cavities and hollow organs, and are the major tissue in glands. ... Opposite the free surface, the cells are attached to underlying connective tissue by a non-cellular basement membrane.

$\implies$Functions of epithelial cells include secretion, selective absorption, protection, transcellular transport, and sensing. Epithelial layers contain no blood vessels, so they must receive nourishment via diffusion of substances from the underlying connective tissue, through the basement membrane.

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$\sim$ $\huge\underline\mathcal {Seed coat}$

$\implies$The outer protective covering of a seed. The seed coat develops from the integument of the ovule. Also called testa.

$\implies$The purpose of the seed coat is to protect the seed from physical, temperature-related, or water damage.

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$\sim$ $\huge\underline\mathcal {Petal}$

$\implies$A petal is the lovely colorful leaf-like ring around the center of the flower, a thin plate for a fairy. The petals make up a flower's corolla, surrounding the center.

$\implies$Petals operate to protect some parts of the flower and attract/repel specific pollinators.

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$\sim$ $\huge\underline\mathcal {Radicals}$

$\implies$In chemistry, a radical is an atom, molecule, or ion that has an unpaired valence electron.

$\implies$Radical expression with the independent variable (usually x) in the radicand. Usually radical equations where the radical is a square root is called square root functions. The value of b tells us where the domain of the radical function begins.

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