Tag: botany

Quizzes (264) Questions (5276)

Questions Related to botany

Multiple choice botany inflorescence introduction to inflorescence inflorescence and its type basics of leaf and flower

In moss capsule, the number of peristome whorls are

  1. 1

  2. 2

  3. 3

  4. 4
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In mosses, the peristome is a specialized structure in the sporangium that allows for gradual spore discharge, instead of releasing them all at once.
Peristome is a ring of triangular teeth formed from the remnants of dead cells with thickened cell walls. There are usually 16 such teeth in a single peristome, separate from each other and able to both fold in to cover the stoma as well as fold back to open the stoma. There are two rings of peristome teeth - an inner endostome and an exostome. These are also referred as perostome whorls.
Therefore the correct option is B. 

Multiple choice botany inflorescence introduction to inflorescence inflorescence and its type basics of leaf and flower

Arrangement of flowers on the floral axis of plant is called?

  1. Inflorescence

  2. Phyllotaxy

  3. Placentation

  4. Corymb
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
A. An inflorescence is the arrangement of flowers on the floral axis of the plant. Two major types of the inflorescence are - 1. Racemose - the shoot axis continues to grow indefinitely and the flowers are borne in acropetal succession. Examples are radish, Lupin, and mustard. 2. Cymose - the main axis terminates into a flower and has a limited growth and the flowers are borne in a basipetal order. Examples are begonia, teak, and Solanum.
B. Phyllotaxy is the pattern in which the leaves are arranged on the stem or its branches. The leaves are arranged in three ways - 1. Alternate - single leaf is present at each node in the alternate fashion. Examples are China rose, mustard, and sunflower. 2. Opposite - a pair of leaves arise at each node on the opposite side, the leaves lie opposite to each other at each node. Examples are guava and calotropis. 3. Whorled - more than two leaves arise at each node and form a whorl or a circle, the leaves of one whorl alternate the leaves of the next successive whorl so that all the leaves receive maximum sunlight. Examples are Alstonia and Nerium.
C. Placentation is the arrangement of ovules on placenta within the ovary. It is of six types- marginal, axile, parietal, free central and basal.
D. A corymb is lower flowers have long pedicels than upper ones so that all the flowers are brought more or less to the same level. The main axis is short. Examples are Iberis and Capsella.

So, the correct answer is 'inflorescence'.
Multiple choice botany plant tissue system ground tissue system ground tissues tissue systems

The most common ground tissue in plants is

  1. Epidermis

  2. Cortex

  3. Parenchyma

  4. Collenchyma
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Parenchyma is a versatile ground tissue that generally constitutes the "filler" tissue in soft parts of plants. It forms, among other things, the cortex and pith of stems, the cortex of roots, the mesophyll of leaves, the pulp of fruits, and the endosperm of seeds. Parenchyma cells are living cells and may remain meristematic at maturity—meaning that they are capable of cell division if stimulated. They have thin and flexible cellulose cell walls, and are generally polyhedral when close-packed, but can be roughly spherical when isolated from their neighbours. They have large central vacuoles, which allow the cells to store and regulate ions, waste products, and water. Tissue specialised for food storage is commonly formed of parenchyma cells.

 So, the correct answer is 'Parenchyma'.

Multiple choice botany plant tissue system ground tissue system ground tissues tissue systems

Laticiferous vessels are found in

  1. Xylem tissue

  2. Phloem tissue

  3. Cortex

  4. None of the above.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Laticiferous vessels are the specialized thin walled parenchymatous cells that secrete latex and are found in the cortex. They lack pits and are composed of cellulose and hemicelluloses and serve to secrete latex. 

So, the correct answer is 'Cortex.'

Multiple choice botany plant tissue system ground tissue system ground tissues tissue systems

Endodermis is part of

  1. Epidermal system

  2. Intrastelar tissue

  3. Extrastelar tissue

  4. Vascular tissue
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Secondary growth refers to addition of extra amount of tissue in the stelar and extrastelar region due to activity of lateral meristem i.e., vascular cambium (fascicular cambium) and cork cambium respectively. Secondary growth in extra stelar zone extends from hypodermis to endodermis and made up of primary tissues during primary growth. 
So, the correct answer is 'Extrastelar tissue.'
Multiple choice botany plant tissue system ground tissue system ground tissues tissue systems

Ground tissue consists of

  1. All tissues internal to endodermis

  2. Epidermis and cortex

  3. All tissues except epidermis and vascular bundles

  4. All tissue external to endodermis
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ground tissue includes all tissues except epidermis and vascular bundles. The ground tissue comprises the bulk of the primary plant body. Parenchyma, collenchyma and sclerenchyma cells are common in the ground tissue.

So, the correct answer is 'All tissues except epidermis and vascular bundles.'

Multiple choice botany plant tissue system ground tissue system ground tissues tissue systems

Parenchymatous cells filling the space, between dermal and vascular tissue is

  1. Ground tissue

  2. Epidermal tissue

  3. Pith

  4. Vascular bundles
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The ground tissue of plants includes all tissues that are neither dermal nor vascular. Parenchyma cells have thin primary walls and usually remain alive after they become mature. Parenchyma forms the "filler" tissue in the soft parts of plants, and is usually present in cortex, pericycle, pith, and medullary rays in primary stem and root.
So, the correct answer is 'Ground tissue.'
Multiple choice botany plant tissue system ground tissue system ground tissues tissue systems

On the basis of location and function, how many types of the tissue system are found in vascular plants?

  1. $2$
  2. $3$
  3. $4$
  4. $5$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

On the basis of location and function, three main tissue systems are found in plants, dermal, vascular, and ground tissue. Dermal tissue is composed of epidermal cells, closely packed cells that secrete a waxy cuticle that aids in the prevention of water loss. The primary components of vascular tissue are the xylem and phloem. The ground tissue of plants includes all tissues that are neither dermal nor vascular. The three types of ground tissue, parenchyma, collenchyma, and sclerenchyma, function in photosynthesis, storage, regeneration, support, and protection.

So, the correct answer is '3'.

Multiple choice botany plant tissue system ground tissue system ground tissues tissue systems

Ground tissue includes 

  1. Cortex and pericycle

  2. Pith

  3. Medullary ray

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The ground tissue of plants includes all tissues that are neither dermal nor vascular. It can be divided into three types parenchyma, collenchyma, and sclerenchyma. Cortex is composed of thin-walled parenchymal cells. The pericycle is a cylinder of parenchyma or sclerenchyma cells that lies just inside the endodermis and is the outer most part of the style of plants.

So, the correct answer is 'Cortex and pericycle'.