Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

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

Procambium is situated just behind apical meristem. Procambium gives rise to 

  1. Primary vascular bundle

  2. Fascicular cambium

  3. cork cambium

  4. Both (1) and (2)`
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Procambium is a primary meristematic tissue that differentiates into primary vascular tissues, specifically the primary xylem and primary phloem. It is distinct from the vascular cambium, which is a secondary meristem.

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

Ram wanted to see the internal structure of a plant stem. He took the transverse section of the stem and observed under the microscope. He saw a number of cells arranged in 3-4 layers of parenchyma cells, followed by pericycle. To which tissue system do these parts belong?

  1. Vascular tissue system

  2. Ground tissue system

  3. Epidermal tissue system

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

  1. Vascular tissue system includes xylem and phloem and helps in food and water conduction.
  2. Ground tissue system mainly consists of simple tissues such as parenchyma, collenchyma, and sclerenchyma. Parenchyma is usually present in cortex, pericycle, pith and medullary ray.
  3. Epidermal tissue system forms the outer -most covering of the complete plant body. Stomata are present here.
  4. Meristematic tissue contributes to the primary growth of the plant and includes apical and intercalary meristems.
So the correct option is "Ground tissue system".

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

The continuity of protoplasm from cell to cell is maintained through

  1. Stomata

  2. Tracheids

  3. Vessels

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

Plasmodesmata are the cytoplasmic thread that connects the cell wall of the two neighbouring cells which helps in intercellular transport or exchange of materials.
Thus, the correct answer is option D.

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

Which of the following is a surface fiber?

  1. Flax

  2. Cotton

  3. Sunn hemp

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

The textile fibers are grouped as surface, soft and hard fibers.  

Cotton is the surface fiber of Gossypium. It is extracted from mature capsule of cotton plant. 
Flax is soft fiber of Linum usitatissimum. It is less elastic than cotton and is used in textile industries. 
Manila hemp is buff coloured hard fiber, which is obtained from leaf sheath of Musa taxtilis and is used in pulp industry. 
Sunn hemp (Crotalaria juncea) is a legume, which yields soft, lignified fibers from its stem, which is utilized in the manufacturing of pulp and paper. 

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.