Biology · Science General

Botany and Plant Science

4,989 Questions

Botany and plant science delve into the biological study of plant life, covering structural anatomy, physiological processes, and reproductive mechanisms. Key topics include inflorescence patterns, root modifications, and seed development, which are vital for biology sections in medical entrance exams. This collection of practice questions helps solidify understanding of complex plant functions.

Plant ReproductionPlant AnatomyRoot ModificationsInflorescence PatternsPlant Morphology

Botany and Plant Science Questions

Multiple choice biology transport in plants diffusion transport in vascular plants types of transport

Which region of plants is considered as supply end?

  1. Root

  2. Fruit

  3. Leaf

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

The translocation of sugars in a plant occurs from source to sink by active loading at source or supply end and active unloading at the sink end. The source and sink are not fixed and keep on changing depending on the physiology of plant. In water transport water is always transported from roots to the aerial parts but not so in case of sugars. 

Sugars are transported from a region, where they are present in high concentration, example leaves to regions of sugar utilisation or storage parts, example storage roots or tubers or fruits etc. 
Thus, storage organs like tubers, roots, fruits etc. serve as sink end and leaves acts as supply end.

Multiple choice biology transport in plants diffusion transport in vascular plants types of transport

Root pressure theory and cohesion adhesion theory is possible due to _____

  1. Phloem

  2. Xylem trachieds

  3. Parenchymatic tissue

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

There are two types of vascular tissues present in the plants viz. Xylem and Phloem. Xylem is responsible for transport of water and some minerals. Phloem is responsible for transport of food and minerals.

Multiple choice biology transport in plants diffusion transport in vascular plants types of transport

Periderm includes __________________.

  1. Phelloderm, collenchyrna and cortex

  2. Phellem, cambium and cortex

  3. All the tissues between epidermis and pith

  4. Phellogen, phellem and phelloderm
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The periderm is the protective secondary covering that replaces the epidermis in woody plants. It consists of three parts: the phellogen (cork cambium), the phellem (cork), and the phelloderm (secondary cortex).

Multiple choice biology transport in plants diffusion transport in vascular plants types of transport

Choose the correct answer from the alternatives given.
Minerals are absorbed in:

  1. meristematic zone

  2. root hair zone

  3. elongation zone

  4. root cap zone
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Plants absorb their mineral salt supply from the soil through the roots from the zones of elongation and root hair. The minerals are absorbed as ions which are accumulated by the plants against their concentration in the soil.

So, the correct option is, 'Elongation zone'.

Multiple choice biology types and parts of plants leaves root, stem, and leaves basics of roots and stem

Which is not a characteristic feature of the stem?

  1. Arises from plumule and is ascending

  2. Growing apex is having a bud

  3. Hairs are multicellular

  4. Branches arise endogenously
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Stems typically arise from the plumule, are ascending, have buds at their growing apices, and often feature multicellular hairs (trichomes). However, lateral branches on stems arise exogenously from outer cortical or epidermal tissues, not endogenously.

Multiple choice evs roots and leaves leaves root, stem, and leaves basics of roots and stem plant adaptation and modification

Which one of these is not a part of a leaf?

  1. Midrib

  2. Lamina

  3. Leaf Base

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

A) The midrib is the large strong central vein in the middle of the leaf.
B) The lamina is the broad green part of the leaf in which photosynthesis takes place.
C) Leaf base is the lowermost part of the leaf from where it attaches to stem or branch.
D) Stamen is the male reproductive part present on a flower.
So the correct option is 'Stamen'.

Multiple choice evs roots and leaves plant adaptation and modification leaves root, stem, and leaves

Pinnately parallel venation is found in

  1. <p> Canna</p>

  2. Grass

  3. <p> Zizyphus</p>

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

Venation is the arrangement of veins on the leaves. It is basically of 2 types, reticulate and parallel. Reticulate venation involves irregular distribution of veins to form a network. Parallel venation involves the veins running parallel to each other. In pinnate or unicostate venation, the lamina has a single principal vein or midrib. It produces lateral veins. In palmate or multicostate venation, lamina has more than one principal vein. In Canna, the venation is pinnately parallel. 

Thus, the correct answer is 'Canna.'

Multiple choice evs roots and leaves plant adaptation and modification leaves root, stem, and leaves

In common weed Parthenium the leaf is compound

  1. Multifoliate

  2. Tripinnate

  3. Decompound

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

Compound leaves are of two types, namely pinnately compound leaves and palmately compound leaves. In palmately compound leaf, the leaflets are arranged at the tip of the petiole. It is further divided into 5 types depending upon the number of leaflets present at the tip of the petiole.

In unifoliate, there is only one terminal leaflet is attached at the top of petiole. Example includes citrus.

In bifoliate, two leaflets are attached side by side at the terminal end of petiole. Example includes Balanites roxburghii.

In trifoliate, three terminal leaflets are attached at the terminal end of petiole. Example includes Aegle marmelos.

In quadrifoliate, four leaflets are attached to the tip of petiole. Example includes Paris quadrifolia.

In multifoliate, five or more leaflets are present at the tip of petiole in the form of fingers of the palm. Example includes Parthenium (common weed).

Thus, the correct answer is 'Multifoliate.'

Multiple choice transpiration major activities of living organisms biology

Collecters secreting sticky exudations are characteristic of

  1. Pyrus

  2. Rosa

  3. Nicotiana

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

In Botany, the term exudate refers to the fluid emitted through pores in the plants and the process is called as exuding. Examples of plant exudates are saps, gums, resins, latex and nectar. Sticky exudates are released from the glandular trichomes of the leaves or branches when damaged or even flowers. These sticky exudations are tactile signals of the plants which either work as alarm signals to the aphids, traps insects or are signals for pollinators.
Therefore, the correct answer is option D.

Multiple choice botany leaf - external morphology venation arrangement of leaves morphology of leaf

Parallel venation is a characteristic feature of ..........

  1. Monocotyledon

  2. Dicotyledon

  3. Pteridophytes

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


Parallel venation, in which veins run parallel to one another from base to the tips of the leaf. Reticulate venation in which veins are arranged in a net like a pattern on both sides.

Name of the organism  Type of venation
Monocotyledons Parallel
Dicotyledons Reticulate
Pteridophytes Reticulate 
Bryophytes The plant body is not differentiated into root, stem, leaves, lack vascular tissue( Xylem and phloem) and there are no veins i.e. .conducting lines, so venation is not present.

So, the correct option is ' Monocotyledonae '