Tag: biology

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Multiple choice biology water absorption and ascent of sap in plants transport of water across plants habit of plants plant classifications

Study the following lists

List-I List-II
(A) Coleorha (I) Development of sporophedirely from gametophewithout intervention ofgametes
(B) Apogamy (II) Development of gametophedirectly om sporophewithout the involvement ofreduction division
(C) Indusium (III) An unbranched columnsstem with a crown of leaves
(D) Caudex (IV) Protedive covering of radical
(V) Protective structure of a sorus

The correct is match:

  1. A B C D

    V II IV I

  2. IV I V III

  3. III V II IV

  4. II III I V
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Coleorhiza is the protective covering of the radicle (IV), Apogamy is development without gametes (I), Indusium is the protective structure of a sorus (V), and Caudex is an unbranched stem (III). This matches IV, I, V, III.

Multiple choice biology water absorption and ascent of sap in plants transport of water across plants habit of plants plant classifications

When a species becomes extinct, the plant and animal species associated with it in an obligatory way also become extinct. This phenomenon is referred to as 

  1. fragmentation

  2. alien species invasion

  3. over-exploitation

  4. co-extinction.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Extinction of one species automatically causes extinction of the other species in certain obligatory mutualistic relationship.

Multiple choice biology water absorption and ascent of sap in plants transport of water across plants habit of plants plant classifications

The $2000$ years old seeds excavated from King Horod's palace in dead sea belongs to.

  1. Strobilanthus kunthiana

  2. Phoenix dactylifera

  3. Lupinus arcticus

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

The 2000-year-old seeds excavated from King Herod's palace near the Dead Sea were identified as Phoenix dactylifera (the date palm).

Multiple choice biology water absorption and ascent of sap in plants transport of water across plants habit of plants plant classifications

Pneumatophores are characteristic of ____________.

  1. Submerged plants

  2. Parasitic plants

  3. Mangroves

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

Mangroves develop specialized roots known as pneumatophores, which emerge above the soil surface to facilitate oxygen uptake in anaerobic, waterlogged mud. This adaptation is essential for survival in coastal intertidal zones.

Multiple choice biology water absorption and ascent of sap in plants transport of water across plants habit of plants plant classifications

With reference to the pioneering word done on the plants listed match List(Plants) with List II(Phenomena) and select the correct answer using the codes given the lists.

List-I(Plants) List-II(Phenomena)
a. Sinapis alba $1$. Phototropism
b. Barely roots $2$. Tanda effect
c. Mougetia $3$. Control of gene expression by phytochrome
d. Arabidopsis $4$. Chloroplast movement
  1. A-$1$, B-$2$, C-$4$, D-$3$
  2. A-$1$, B-$4$, C-$2$, C-$3$
  3. A-$3$, B-$2$, C-$4$, D-$1$
  4. A-$3$, B-$4$, C-$2$, D-$1$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sinapis alba relates to phototropism, Barley roots to the Tanda effect, Mougetia to chloroplast movement, and Arabidopsis to phytochrome gene expression. This matches A-1, B-2, C-4, D-3.

Multiple choice biology water absorption and ascent of sap in plants transport of water across plants habit of plants plant classifications

Papaya is a dioecious plant. This condition prevents.

  1. Both autogamy and geitenogamy

  2. Only autogamy

  3. Only xenogamy

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

Dioecious plants have male and female flowers on separate individuals. This physical separation prevents both autogamy (self-pollination within the same flower) and geitonogamy (pollination between flowers on the same plant).

Multiple choice biology water absorption and ascent of sap in plants transport of water across plants habit of plants plant classifications

Which of the following statements are not true?

  1. In CAM plants, stomata open during dark and remain closed during the day
  2. Role of $Na^+$ in stomatal opening is now universally accepted

  3. Water potential of root cells is higher than water potential of soil

  4. Capillarity theory is most accepted theory of water movement through plants

  5. Wall of xylem vessels made up of lignocellulose has strong affinity for water molecules
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice biology water absorption and ascent of sap in plants transport of water across plants habit of plants plant classifications

A plant that trails prostrately on ground is ____________.

  1. Smilax

  2. Portulaca

  3. Pothos

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Portulaca species typically grow prostrate or trailing on the ground, spreading horizontally rather than standing erect. They are common succulent weeds or garden plants exhibiting a prostrate habit.