Chapter 10: Reproduction in Plants

Solve · page 166: 10. Label the given diagram of flower.

Labeled diagram of a typical flower

<svg viewBox="0 0 340 240" font-size="13" xmlns="http://www.w3.org/2000/svg"> <defs> <marker id="arrow" markerWidth="6" markerHeight="6" refX="5" refY="3" orient="auto"> <polygon points="0 0,5 3,0 6" fill="currentColor"/> </marker> </defs>

<!-- Ovary --> <circle cx="180" cy="140" r="12" stroke="currentColor" fill="none"/> <!-- Style --> <line x1="180" y1="128" x2="180" y2="110" stroke="currentColor" marker-end="url(#arrow)"/> <!-- Stigma --> <circle cx="180" cy="106" r="4" stroke="currentColor" fill="none"/> <!-- Filament --> <line x1="180" y1="106" x2="180" y2="80" stroke="currentColor" marker-end="url(#arrow)"/> <!-- Anther --> <ellipse cx="180" cy="70" rx="10" ry="5" stroke="currentColor" fill="none"/>

<!-- Petals (4) --> <ellipse cx="180" cy="50" rx="30" ry="15" stroke="currentColor" fill="none"/> <ellipse cx="210" cy="80" rx="15" ry="30" stroke="currentColor" fill="none"/> <ellipse cx="150" cy="80" rx="15" ry="30" stroke="currentColor" fill="none"/> <ellipse cx="180" cy="110" rx="30" ry="15" stroke="currentColor" fill="none"/>

<!-- Sepals (4) --> <ellipse cx="180" cy="30" rx="38" ry="18" stroke="currentColor" fill="none"/> <ellipse cx="225" cy="55" rx="18" ry="38" stroke="currentColor" fill="none"/> <ellipse cx="135" cy="55" rx="18" ry="38" stroke="currentColor" fill="none"/> <ellipse cx="180" cy="120" rx="38" ry="18" stroke="currentColor" fill="none"/>

<!-- Labels with leader lines --> <!-- Ovary label --> <line x1="192" y1="140" x2="210" y2="150" stroke="currentColor" marker-end="url(#arrow)"/> <text x="215" y="155" text-anchor="start">Ovary</text>

<!-- Style label --> <line x1="190" y1="119" x2="210" y2="130" stroke="currentColor" marker-end="url(#arrow)"/> <text x="215" y="135" text-anchor="start">Style</text>

<!-- Stigma label --> <line x1="190" y1="106" x2="210" y2="100" stroke="currentColor" marker-end="url(#arrow)"/> <text x="215" y="105" text-anchor="start">Stigma</text>

<!-- Filament label --> <line x1="190" y1="93" x2="210" y2="85" stroke="currentColor" marker-end="url(#arrow)"/> <text x="215" y="80" text-anchor="start">Filament</text>

<!-- Anther label --> <line x1="190" y1="70" x2="210" y2="60" stroke="currentColor" marker-end="url(#arrow)"/> <text x="215" y="55" text-anchor="start">Anther</text>

<!-- Petal label --> <line x1="180" y1="45" x2="150" y2="30" stroke="currentColor" marker-end="url(#arrow)"/> <text x="145" y="25" text-anchor="end">Petal</text>

<!-- Sepal label --> <line x1="180" y1="20" x2="150" y2="10" stroke="currentColor" marker-end="url(#arrow)"/> <text x="145" y="5" text-anchor="end">Sepal</text>

<!-- Pistil (overall) label --> <line x1="180" y1="140" x2="130" y2="140" stroke="currentColor" marker-end="url(#arrow)"/> <text x="125" y="140" text-anchor="end">Pistil (female part)</text>

<!-- Stamen (overall) label --> <line x1="180" y1="70" x2="230" y2="70" stroke="currentColor" marker-end="url(#arrow)"/> <text x="235" y="70" text-anchor="start">Stamen (male part)</text> </svg>

• Scale: drawing is schematic; each centimeter on paper ≈ 10 px in the diagram.
• Construction steps: draw ovary (circle), add style (line) and stigma (small circle); extend filament and draw anther (ellipse). Sketch four petals and four outer sepals (ellipses). Finally, attach leader lines and write the labels.

Check: Verify that every major part listed in your textbook (sepals, petals, stamen – filament + anther, pistil – stigma + style + ovary) is present and correctly labeled.