Question

Q.1) Define :

1) Veins 2) Petiole 3) Venation 5) Simple leaf​

Answer 1

Answer:

1) Veins are vessels of the circulatory system that support circulation by conveying blood to the heart. Blood flowing through the circulatory system transports nutrients, oxygen, and water to cells throughout the body.

2) The petiole is a stalk that connects the blade with the leaf base. The blade is the major photosynthetic surface of the plant and appears green and flattened in a plane perpendicular to the stem.

3) an arrangement or system of veins (as in the tissue of a leaf or the wing of an insect)

4) A simple leaf blade is undivided as shown on the left (though the margins may be toothed or even lobed). The blade of a compound leaf is divided into several leaflets as shown on the right. ... Each leaf, whether simple or compound, has a bud at its base (on the twig). There are no buds at the base of each leaflet.

Explanation:

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Answer 2

Answer:

1)Veins:-

• any of the tubes forming part of the blood circulation system of the body, carrying in most cases oxygen-depleted blood towards the heart.
• (in general use) a blood vessel.
• "he felt the adrenaline course through his veins"
• (in plants) a slender rib running through a leaf or bract, typically dividing or branching, and containing a vascular bundle.
• (in insects) a hardened branching rib that forms part of the supporting framework of a wing, consisting of an extension of the tracheal system; a nervure.
• a fracture in rock containing a deposit of minerals or ore and typically having an extensive course underground.
• a streak or stripe of a different colour in wood, marble, cheese, etc.
• a source of a specified quality.
• a distinctive quality, style, or tendency.

2) Petiole:-

• the stalk that joins a leaf to a stem.( in botany)
• a slender stalk between two structures, especially that between the abdomen and thorax of a wasp or ant.(in zoology)

3) Venation:-

• the arrangement of veins in a leaf or in an insect's wing.
• the system of venous blood vessels in an animal.

5) Simple leaf:-

• A simple leaf blade is undivided as shown on the left (though the margins may be toothed or even lobed). The blade of a compound leaf is divided into several leaflets as shown on the right. ... Each leaf, whether simple or compound, has a bud at its base (on the twig). There are no buds at the base of each leaflet.