Vascular Cambium in Plant Stem Anatomy
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Questions and Answers

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?

<p>Monocot mesophyll lacks differentiation into palisade and spongy mesophyll present in dicots (C)</p> Signup and view all the answers

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

<p>Upper epidermis has a thinner cuticle than lower epidermis (C)</p> Signup and view all the answers

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

<p>Angular walls (C)</p> Signup and view all the answers

What type of leaf venation is characteristic of dicots?

<p>Both pinnately reticulate and palmately reticulate (C)</p> Signup and view all the answers

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

<p>To absorb light and manufacture food (C)</p> Signup and view all the answers

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

<p>To prevent excessive loss of water (C)</p> Signup and view all the answers

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

<p>Five fingers (A)</p> Signup and view all the answers

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

<p>Leaf venation (B)</p> Signup and view all the answers

Which type of leaf venation is characteristic of monocots?

<p>Parallel venation (C)</p> Signup and view all the answers

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

<p>Epicotyl (A)</p> Signup and view all the answers

Which hormone prevents germination of seeds?

<p>Dormin (A)</p> Signup and view all the answers

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

<p>By censer mechanism (C)</p> Signup and view all the answers

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

<p>Wings (D)</p> Signup and view all the answers

What external agents help in fruit and seed dispersal?

<p>Dispersal by animals (D)</p> Signup and view all the answers

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

<p>Bacterial action (A)</p> Signup and view all the answers

What is the primary function of the vascular cambium?

<p>To produce secondary tissues that add to the girth of the stem (C)</p> Signup and view all the answers

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

<p>To transport nutrients and water throughout the plant (B)</p> Signup and view all the answers

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

<p>Endodermis (B)</p> Signup and view all the answers

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

<p>To reduce water loss from the stem surface (C)</p> Signup and view all the answers

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

<p>Parenchyma, collenchyma, and sclerenchyma (C)</p> Signup and view all the answers

Which statement about stems is true?

<p>The thick walls of tracheids and vessel elements in xylem help support the plant (B)</p> Signup and view all the answers

What is a catkin?

<p>A spike with a long and pendulous axis bearing unisexual flowers (C)</p> Signup and view all the answers

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

<p>Umbel (B)</p> Signup and view all the answers

What is the defining characteristic of a corymb inflorescence?

<p>The main axis is comparatively short, and the lower flowers have longer stalks (C)</p> Signup and view all the answers

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

<p>Capitulum or head (A)</p> Signup and view all the answers

What is the defining characteristic of a cyme inflorescence?

<p>The main axis ends in a flower that opens before the flowers below or on its side (C)</p> Signup and view all the answers

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

<p>Panicle (C)</p> Signup and view all the answers

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