Vascular Cambium in Plant Stem Anatomy

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What is the main function of spongy parenchyma in a leaf?

Photosynthesis

Storage of water and food

Structural support

Exchange of gases (correct)

Where are phloem cells located in a leaf?

In the spongy mesophyll

Below the xylem towards the upper epidermis

Around the intercellular spaces

Above the xylem towards the lower epidermis (correct)

What is the function of veins (vascular bundles) in a leaf?

Protection against herbivores

Photosynthesis

Storage of nutrients

Distribution of water and food (correct)

How do monocot and dicot leaves differ in terms of mesophyll?

Monocot mesophyll lacks differentiation into palisade and spongy mesophyll present in dicots Signup and view all the answers

What is the main difference between upper and lower epidermis in a leaf?

Upper epidermis has a thinner cuticle than lower epidermis Signup and view all the answers

Which characteristic is common to both xylem and phloem cells in a leaf?

Angular walls Signup and view all the answers

What type of leaf venation is characteristic of dicots?

Both pinnately reticulate and palmately reticulate Signup and view all the answers

What is the main function of the palisade parenchyma cells in the mesophyll?

To absorb light and manufacture food Signup and view all the answers

What is the purpose of the waxy cuticle on the upper epidermis of the leaf?

To prevent excessive loss of water Signup and view all the answers

Which of the following is an example of a palmately compound leaf?

Five fingers Signup and view all the answers

What is the term used to describe the arrangement of veins and veinlets in a leaf?

Leaf venation Signup and view all the answers

Which type of leaf venation is characteristic of monocots?

Parallel venation Signup and view all the answers

What is the portion of the axis that lies immediately above the cotyledons known as?

Epicotyl Signup and view all the answers

Which hormone prevents germination of seeds?

Dormin Signup and view all the answers

How are some seeds dispersed by wind using a parachute mechanism?

By censer mechanism Signup and view all the answers

Which type of appendages do some seeds develop to aid in dispersal by wind?

Wings Signup and view all the answers

What external agents help in fruit and seed dispersal?

Dispersal by animals Signup and view all the answers

In seed dormancy, what can create cracks in the seed coat to initiate germination?

Bacterial action Signup and view all the answers

What is the primary function of the vascular cambium?

To produce secondary tissues that add to the girth of the stem Signup and view all the answers

What is the primary function of the stele in a stem?

To transport nutrients and water throughout the plant Signup and view all the answers

Which of the following is NOT a component of the stem cross-section?

Endodermis Signup and view all the answers

What is the primary function of the cuticle in a stem?

To reduce water loss from the stem surface Signup and view all the answers

Which of the following tissues can be found in the cortex of a stem?

Parenchyma, collenchyma, and sclerenchyma Signup and view all the answers

Which statement about stems is true?

The thick walls of tracheids and vessel elements in xylem help support the plant Signup and view all the answers

What is a catkin?

A spike with a long and pendulous axis bearing unisexual flowers Signup and view all the answers

Which inflorescence type has flowers with pedicels of more or less equal lengths?

Umbel Signup and view all the answers

What is the defining characteristic of a corymb inflorescence?

The main axis is comparatively short, and the lower flowers have longer stalks Signup and view all the answers

Which inflorescence type has a suppressed main axis with flowers crowded on a flat receptacle?

Capitulum or head Signup and view all the answers

What is the defining characteristic of a cyme inflorescence?

The main axis ends in a flower that opens before the flowers below or on its side Signup and view all the answers

Which inflorescence type has stalked flowers on a branched main axis?

Panicle Signup and view all the answers