Tag: special tissues

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Questions Related to special tissues

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

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

  1. Sclereids

  2. Idioblasts

  3. Stone cells

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

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

Mesarch xylem is common in

  1. Ferns

  2. Bryophytes

  3. Dicots

  4. Monocots
Reveal answer Fill a bubble to check yourself
A Correct answer
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.
Multiple choice special tissues plant tissues plant tissues - internal morphology and anatomy anatomy of flowering plants biology

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

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'

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

Amphiphloic (bicollateral) condition of stele means, that

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

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

Ferulic acid, coumarin and hesperidin are

  1. Secondary plant products

  2. Hormones

  3. Enzymes

  4. Vitamins
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.
Multiple choice special tissues plant tissues plant tissues - internal morphology and anatomy anatomy of flowering plants biology

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
  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-$1$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hydathodes are structures on leaf tips for guttation (a-3). Collenchyma is a living mechanical tissue with pectin-rich walls (b-2). Periblem is the meristematic layer that develops into the cortex (c-4). Tyloses are balloon-like outgrowths from xylem parenchyma into vessels (d-1).