Tag: plant tissues - internal morphology and anatomy

Questions Related to plant tissues - internal morphology and anatomy

Specialized parenchyma cells which store tannins, oils and crystals of calcium oxalate are called

special tissues plant tissues plant tissues - internal morphology and anatomy anatomy of flowering plants biology

  1. Sclereids

  2. Idioblasts

  3. Stone cells

  4. Conjunctive tissue

Show answer
Correct Option: B
Explanation:

Parenchymatous tissues are readily used for storage of various cells like food, air and chlorophyll. An idioblast is atype of parenchyma tissue which mainly  performs various functions such as storage of reserves, excretory materials, pigments, and minerals. They contain oil, latex, gum, resin, tannin or pigments, poisonous calcium oxalate or carbonate or silica. Idioblasts are divided into three main categories: excretory, tracheoid, and sclerenchymatous.

Mesarch xylem is common in

special tissues plant tissues plant tissues - internal morphology and anatomy anatomy of flowering plants biology

  1. Ferns

  2. Bryophytes

  3. Dicots

  4. Monocots

Show answer
Correct Option: A
Explanation:
Mesarch is used when there is more than one strand of primary xylem in a stem or root and the xylem develops from the middle of a strand in both directions. The metaxylem is thus on both the peripheral and central sides of the strand with the protoxylem between the metaxylem (possibly surrounded by it). 
The leaves and stems of many ferns have mesarch development.

Laticiferous vessels are found in

special tissues plant tissues plant tissues - internal morphology and anatomy anatomy of flowering plants biology

  1. Xylem tissue

  2. Phloem tissue

  3. Cortex

  4. None of the above

Show answer
Correct Option: C
Explanation:

Lacticiferous vessels are found in plants that produce latex. Laticifers are connected longitudinally to form long chains of coenocytic cells. Laticifers or lacteal ducts are located in the cortex and are specialized type of parenchymatous cells.
So, the correct answer is 'Cortex'

The complex tissues include

special tissues plant tissues plant tissues - internal morphology and anatomy anatomy of flowering plants biology

  1. Scleroids

  2. Sclerenchyma

  3. Secretory tissues

  4. Collenchyma

Show answer
Correct Option: C
Explanation:

Vascular tissue is also called as complex tissue. It is heterogeneous in nature with different types of cells. The chief elements are xylem, phloem and pericycle. 
Thus, the correct answer is option C.

Amphiphloic (bicollateral) condition of stele means, that

special tissues plant tissues plant tissues - internal morphology and anatomy anatomy of flowering plants biology

  1. Phloem is surrounded by xylem

  2. Phloem is on both sides of xylem

  3. Phloem is internal to xylem

  4. Phloem is external to xylem

Show answer
Correct Option: B
Explanation:

In a stele, if phloem is both external and internal to xylem, it is called as bicollateral, as found in leaves mostly and in a few stems. This can be seen in Solanaceae and Cucurbitaceae family.

Conducting part of phloem, according to Haberlandt (1914) is 

special tissues plant tissues plant tissues - internal morphology and anatomy anatomy of flowering plants biology

  1. Hadrome

  2. Leptome

  3. Stem

  4. Bark

Show answer
Correct Option: B
Explanation:

Leptome is actually a phloem. The term was given by Haberlandt. It is responsible for conduction of organic substances.
Thus, the correct answer is option B.

Ferulic acid, coumarin and hesperidin are

special tissues plant tissues plant tissues - internal morphology and anatomy anatomy of flowering plants biology

  1. Secondary plant products

  2. Hormones

  3. Enzymes

  4. Vitamins

Show answer
Correct Option: A
Explanation:
Secondary metabolites are plant products that are not involved in the development and growth of plant but are required by the plant for its survival. Plant secondary metabolites are divided into three groups, namely flavonoids, phenolic and polyphenolic compounds like ferulic acid, hesperidin and coumarin; terpenoids; and nitrogen-containing alkaloids and sulphur-containing compounds.
Thus, the correct answer is 'Secondary plant products'.

Match List I(Type of Tissues/structures) with List II(Characteristic features of the tissue) and select the correct answer using the codes given the lists.

List-I List-II
a. Hydathodes $1$. Balloon-like protrusions into treachery element, developed from Xylem Parenchyma 
b. Collenchyma $2$. Mechanical tissue that consists of living cells, walls rich in pectin and hemicelluloses
c. Periblem $3$. Occur on leaf tips responsible for guttation
d. Tyloses $4$. Meristematic tissue responsible for the development of cortex
special tissues plant tissues plant tissues - internal morphology and anatomy anatomy of flowering plants biology

  1. A-$2$, B-$3$, C-$4$, D-$1$

  2. A-$3$, B-$2$, C-$1$, D-$4$

  3. A-$2$, B-$3$, C-$1$, D-$4$

  4. A-$3$, B-$2$, C-$4$, D-$1$

Show answer
Correct Option: A

Histogen theory is more applicable for

botany plant tissues - internal morphology and anatomy theories of meristematic cell development theories of shoot apical meristem development shoot and root apex

  1. Root apex

  2. Meristematic tissue

  3. Both (A) and (B)

  4. None of the above

Show answer
Correct Option: A
Explanation:

The histogen theory was given by Hanstein (1870). The three principal tissues of the root vascular cylinder, cortex and epidermis originate from three groups of initial cells or histogens, in the apical meristem plerome, periblem and dermatogen respectively. A fourth histogen, the calyptrogen, produces the root cap.    
Thus, the correct answer is option A.    

Histogen is a

botany plant tissues - internal morphology and anatomy theories of meristematic cell development theories of shoot apical meristem development shoot and root apex

  1. Promeristem derivative destined to produce specific areas

  2. Intercalary meristem meant for forming specific tissue

  3. Derivative of lateral meristem

  4. Secondary meristem specialised to produce specific structures

Show answer
Correct Option: A
Explanation:
  • Promeristem is a group of young meristematic cells in its early embryonic stage from which other meristems are derived. 
  • Apical meristems are derived from promeristem and are present below the promeristem at shoot tip and root tip.
  • The shoot apical meristem (SAM) consists of three distinct meristematic zones called the histogens.
  • These histogens are present at the growing tips of a stem or a root.
  • These tips consist of three histogens and each of these histogens gives rise to tissues which are different from one another- dermatogen, periblem, plerome (principle tissues)
  • The dermatogen or the outer layer gives rise to the epidermis, periblem or middle layer gives rise to the cortex as well as the epidermis, plerome or the inner layer gives rise to vascular tissues.
  • So, the correct answer is 'Promeristem derivative destined to produce specific areas'.