Biology

Plant Biology and Classification

1,796 Questions

Plant Biology and Classification deals with the taxonomy, evolution, and morphological features of the plant kingdom. This collection offers practice questions on plant groups, taxonomic hierarchies, and specific plant characteristics. The questions are tailored for students preparing for biology competitive exams.

Plant taxonomyPteridophytesAngiospermsPlant morphologyAlgae and bryophytesClassification systems

Plant Biology and Classification Questions

Multiple choice evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

Which of the following plants produces seeds but not flowers : -

  1. Maize

  2. Mint

  3. Peepal

  4. Pinus
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
 Pinus is a gymnospermic plant. Ovules of Pinus are uncovered which lie on the megasporophyll, hence these plants do not have flowers. However it produces seeds (from ovule after fertilization) like the other three plants mentioned, all of which are angiosperms.

So, the correct answer is 'Pinus'.
Multiple choice evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

which of the following is vesselless Gymnosperm ?

  1. Gnetum

  2. Ephedra

  3. Williamsonia

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

Gymnosperms are seed bearing plants. They are flowerless plants. Most of the gymnosperms are vesselless. They do not have vessels in their xylem. The only division which have vessels is Gnetophytes. Gnetophytes having vessel include Genus Gnetum, Ephedra and Welwitschia. 

Thus, the correct answer is option C.

Multiple choice evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

Which of the following is the best evidence that gymnosperms have descended from pteridophytes?

  1. Some gymnosperms have ciliated sperms

  2. They have cones

  3. They have evergreen

  4. Some gymnosperms cannot bear fruit
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Gymnosperms and angiosperms, sperm cells have no cilia. All other motile land plant sperm cells are released into the environment.

So, the correct option is 'Some gymnosperms have ciliated sperms'.


Multiple choice evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

The total number of species belonging to present day gymnosperms is about

  1. 2000

  2. 850

  3. 2500

  4. 4000
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The total number of living gymnosperms of the world is about 850 species, belonging to 79 genera of 15 families. Although the number of species of gymnosperms accounts for only 0.36% of that of the angiosperms, they have formed large areas of various kinds of coniferous forests and are widely distributed all over the world, especially on mountains from middle to alpine latitudinal zones in cold-temperate and subtropical latitudes of the Northern hemisphere.

Therefore, the correct answer is option B.

Multiple choice evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

Which plant group is exclusively perennial?

  1. Dicots

  2. Ferns

  3. Gymnosperms

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

A perennial plant or simply perennial is a plant that lives for more than two years. 

One of the main characteristics of gynmosperms is that the group consists of plants that are perennial and woody. 

Multiple choice evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

Which group of plants is exclusively arborescent (woody)?

  1. Pteridophytes

  2. Dicots

  3. Gymnosperms

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

The gymnosperm is represented by a perennial, evergreen, woody plant. Most of them are trees and some are shrubs. A few gymnosperms may be lianas or climbers. There are no herbs. Gymnosperms include one of the world's tallest trees, Sequoia sempervirens.

Multiple choice evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

Which of the following are absent in group gymnosperm?

  1. Trees

  2. Shrubs

  3. Liana

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

The gymnosperms are a group of seed-producing plants that do not produce flowers. These include conifers, cycads, Ginkgo, and gnetales. Though they are seed bearing their seeds are not enclosed in ovary they make up for about 700 species of woody plants with most of them being trees and some shrubs. A few gymnosperms however may lianas or climbers. However, there are no herbs in the group.

Multiple choice evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

Fruits are not formed in gymnosperms, because

  1. Fertilization is absent

  2. Pollination is absent

  3. Seeds are not formed

  4. Ovary is absent
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fruits are not formed in gymnosperms due to absence of ovary. The ovules of a gymnosperm do not develop in an ovary but are "naked". Seeds develop from the ovules that are found in the developed ovaries but in the case of gymnosperms, the ovules are located directly on the surface of the flower or cone. 

Multiple choice evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

The characters of gymnosperms are

  1. Seeds are naked

  2. Fruits are absent

  3. True carpel absent

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

Gymnosperms were the first plants to have seeds. They are often referred to as having naked seeds because they do not have flowers and they develop on the surface of the reproductive structures of the plants rather than being contained in a specialized ovary. These seeds are often found on the surface of cones and short stalks.

Gymnosperms are a group of plants with the following unique characteristics:

  • They do not have an outer covering or shell around their seeds.
  • They do not produce flowers.
  • They do not produce fruits.
  • They are pollinated by the wind.

Multiple choice evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

Choose the correct answers from the alternatives given.
In which one of the following groups would you place a plant which produces seeds but lacks fruits

  1. Bryophytes

  2. Pteridophytes

  3. Gymnosperms

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

The gymnosperms are the plants in which the ovules are not enclosed by an ovary wall and remain exposed, both before and after fertilization. This is that developers fertilization are not covered that is they are naked.


So, the correct option is gymnosperm.

Multiple choice evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

Choose the correct answers from the alternatives given.
Fruits are not formed in gymnosperms because:

  1. they are seedless

  2. they are not pollinated

  3. the process of fertilization does not occur

  4. they have no ovary
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gymnosperms have no ovary, they can never produce fruit.  

Seeds develop from the ovules which are found in the developed ovaries or fruit, but in the case of gymnosperms, the ovules are located directly on the surface of the flower or cone.  Yews and ginkgoes develop fruit-like structures, but their seed is not inside these organs, which makes them gymnosperms.
So the correct answer is 'They have no ovary'.

Multiple choice biology pictorial feature of plant kingdom pteridophytes introduction to pteridophytes cryptogams

The most primitive vascular plants are ___________.

  1. Cycas

  2. Ferns

  3. Moss

  4. Brown algae
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Most premitive vascular plants are pteridophytes.
Cycas belongs to gymnosperms. Gymnosperms have a well-differentiated plant body with vascular tissues. They produce naked seeds. Hence, option A is incorrect. 
Moss belongs to bryophytes. Bryophytes have a well-differentiated plant body with stem and leaf-like structures. But there is no specialized vascular or mechanical tissue. Therefore, option C is incorrect. 
Brown algae belong to thallophytes. Thallophytes do not have well-differentiated plant body and vascular tissues. Therefore, option D is incorrect. 
Ferns belong to pteridophytes. Pteridophytes have a well-differentiated plant body with vascular tissues. Therefore, option B is correct. 

Multiple choice examples of bryophytes plant kingdom biology

Main plant of Funaria belongs to phase

  1. Polypoid

  2. Diploid

  3. Triploid

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

The main plant body of a bryophyte like Funaria is the gametophyte, which is haploid (n).

Multiple choice examples of bryophytes plant kingdom biology

Which of the following statements attributed to the fact that 'Lifecycle of Funaria is not completed without water'?

  1. As fertilization takes place only in the presence of water

  2. As Funaria is a hydrophyte

  3. As plant is delicate and will dry without water

  4. As branches will not develop
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bryophytes like Funaria require water for the flagellated sperm (antherozoids) to swim to the archegonium for fertilization.