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Botany Lab(Finals) > Leaves > Flashcards

Leaves Flashcards

1
Q

What is one of the main functions of leaves?

A

Photosynthesis

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2
Q

What is transpiration in the context of leaves?

A

The process of water vapor exiting the leaf through small openings called stomata.

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3
Q

What is gas exchange in leaves?

A

The process of exchanging gases, such as oxygen and carbon dioxide, between the leaf and the environment.

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4
Q

What is one of the functions of leaves related to storage?

A

Storage of water in certain plants.

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5
Q

What adaptation do succulents have in their leaves?

A

Thick, fleshy leaves adapted to store water, enabling them to survive in arid environments.

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6
Q

The broad, flat part of the
leaf responsible for capturing sunlight and conducting photosynthesis. It has a large
surface area to maximize light absorption.

A

Blade (Lamina)

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7
Q

The stalk that connects the leaf
blade to the stem.

A

Petiole

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8
Q

The central vein that runs down the middle of the leaf, providing structural
support. It also contains vascular tissue

A

Midrib

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9
Q

A network of smaller vascular
bundles (xylem and phloem) that branch out from the midrib.

A

Veins

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10
Q

These _____ provide
structural support and are involved in the transport of water and nutrients into the
leaf and the movement of sugars produced during photosynthesis.

A

Veins

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11
Q

Small, leaf-like structures found at the base of the petiole in some plants.
They can protect the developing leaf or
stem, or help in photosynthesis in some species.

A

Stipules

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12
Q

Small pores located mostly on
the underside of the leaf

A

Stomata

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13
Q

Stomata controls what?

A

Gas exchange

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14
Q

Stomata control gas exchange (CO₂ in, O₂ out) and water vapor loss (transpiration) by opening and closing in response to environmental conditions.

A

Stomata

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15
Q

A waxy, protective layer on the
surface of the leaf that reduces water loss and provides protection against pathogens
and environmental stress

A

Cuticle

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16
Q

The inner tissue of the leaf

A

Mesophyll

17
Q

Two layers of mesophyll

A

Palisade mesophyll and Spongy mesophyll

18
Q

The upper layer of tightly packed cells where most of the photosynthesis occurs.

A

Palisade Mesophyll

19
Q

The lower layer, with loosely arranged cells and air spaces, allowing for gas exchange.

A

Spongy Mesophyll

20
Q

refers to the arrangement of veins in a leaf.

A

Leaf venation

21
Q

the veins form a network or web-like. structure.

A

Reticulate venation

22
Q

A prominent central vein (midrib) branches out into a network. Common in dicot plants (plants with two seed leaves).

A

Reticulate Venation

23
Q

veins run parallel to each other from the base to the tip of the leaf

A

Parallel Venation

24
Q

Characteristics of ______ __________ are: No network is formed. Common in monocot plants (plants with a single seed leaf).

A

Parallel Venation

25
Q

refers to the arrangement of leaves on the stem or branch of a plant.

A

Phyllotaxy

26
Q

A single leaf grows at each node, alternately arranged on
opposite sides of the stem.

A

Alternate Phyllotaxy

27
Q

Two leaves grow opposite each other at the same node.

A

Opposite Phyllotaxy

28
Q

More than two leaves grow in a circular arrangement at a
single node.

A

Whorled Phyllotaxy

29
Q

These are modified leaves that provide protection against herbivores and reduce water loss.

A

Spines

30
Q

are underground storage organs made of modified leaves, typically used to store food and energy.

A

Bulb Scales

31
Q

These are modified leaves that are often colorful and can help attract pollinators to flowers

A

Bracts

32
Q

These leaves are modified to capture and digest insects or other small organisms to supplement the plant’s nutrient intake, especially
in nutrient-poor soils.

A

Insectivorous (Carnivorous) Leaves

33
Q

Some leaves are modified to store water, nutrients, or
carbohydrates.

A

Storage leaves

34
Q

These are flattened leaf-like structures that perform photosynthesis while the true leaves are modified or
reduced.

A

Phyllodes

Botany Lab(Finals) (7 decks)

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