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 zoology why classification? classification hierarchy hierarchy of classification different types of classifications modern classification system

The general Agave and Yucca were once placed in two different families, Amaryllidaceous and Liliaceous respectively. However, now both these genera are transferred to the family Agavaceae because of their similarity in.

  1. Anatomy

  2. Pollen

  3. Geographical distribution

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

Agave and Yucca were moved to Agavaceae primarily due to their anatomical similarities, specifically in their vascular structure and leaf morphology.

Multiple choice zoology basis of classification classification hierarchy hierarchy of classification different types of classifications

The highest category in taxonomy is 

  1. Phylum

  2. Class

  3. Kingdom

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

  • According to the taxonomical hierarchy, the kingdom is the highest category in biological classification. It is a group of closely related organisms. 
  • Kingdom → Phylum → Class → Order → Family → Genus → Species.
  • Example: All plants have common features of the autotrophic mode of nutrition and the presence of a cell wall made up of cellulose. Hence, they belong to the kingdom Plantae.
So, the correct option is 'Kingdom'.

Multiple choice zoology classification of living beings classification hierarchy hierarchy of classification different types of classifications introduction to classification of living organisms

In Vedic times, living organisms were classified into following number of classes

  1. 2

  2. 3

  3. 4

  4. 5
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In Vedic times, the ;living organisms were divided into the following:

1. Born from the womb (Jivagi.)
2. Born from egg (Andaja.)
3. Born from sprouts (Udbhija.)

Hence, the correct answer is option B. 

Multiple choice botany why classification? classification hierarchy hierarchy of classification different types of classifications modern classification system

Choose the correct answers from the alternatives given.
The system of plant classification proposed by Carolus Linnaeus was artificial because:

  1. he was not a naturalist

  2. his classification was based on similarities and differences in floral and other morphological characters only

  3. his classification was based on evolutionary relationships

  4. he took into account the physiological relationships along with morphological observations
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Linnaeus's system was artificial because it relied on a few easily observable morphological characters, such as the number of stamens, rather than evolutionary or phylogenetic relationships.

Multiple choice biology diversity in living things and their classification introduction to plant organs and germination seed to plants germination of seeds

Who of the following is associated with the description of life-forms in plants communities?

  1. Tansley

  2. Shelford

  3. Slobodkin

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

C. Raunkiaer is a Danish botanist famous for proposing a system of plant life-forms based on the position of the perennating buds relative to the soil surface, which is widely used in plant ecology and community description.

Multiple choice biology chemical coordination and integration hormones of placenta coordination in human beings- chemical control endocrine system in humans

Consider the following statements and choose the correct options.
I. Ovule is attached to the placenta by means of a stalk called filaments.
II. Ovule fuses with the stalk in the region called hilum.
III. The two protective envelopes of the ovule are called integuments.
IV. The small opening in the tip of ovule is called germ pore.

  1. I and IV

  2. I and III

  3. II and IV

  4. II and III
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Statement II is correct because the ovule fuses with its stalk (funicle) at the region called the hilum. Statement III is correct because ovules are protected by integuments. Statement I is wrong because the stalk is called the funicle, not the filament. Statement IV is wrong because the small opening is the micropyle, not a germ pore.

Multiple choice biology biological diversity species, communities and ecosystems kingdom fungi monera, protista, fungi

Which of the following is correct in case of  homosporous pteridophytes?

  1. All the sporangia are similar

  2. Male and female gametophytes exist

  3. Two different types of spores are present

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

Homosporous pteridophytes produce only one type of spores. Also, all the sporangia in a homosporous pteridophyte are similar.

So, the correct option is 'All the sporangia are similar'.

Multiple choice biology biological diversity species, communities and ecosystems kingdom fungi monera, protista, fungi

Which of the following is called the walking fern?

  1. Selaginella

  2. Adiantum

  3. Equisetum

  4. Psilotum
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
A.Selaginella - spike moss
B.Adiantum - walking fern
C.Equisetum - Horsetails
D.Psilotum - whisk fern
Walking fern is a common name for Adiantum. It belongs to Pteridophyta. It got its name as wherever arching leaves of parent plant body touches the ground, new plantlets grow giving it a walking appearance.
So, the correct option is 'Adiantum'.
Multiple choice biology biological diversity species, communities and ecosystems kingdom fungi monera, protista, fungi

Which character of pteridophytes is not similar to bryophytes?

  1. Water requirement for fertilization

  2. Dependence of sporophyte on gametophyte

  3. Heterospory

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

  • Bryophytes are known as the amphibians of plant kingdom because they need water for fertilisation. The sperms of bryophytes are flagellated and reach the eggs by means of swimming in water. On the other hand, pteridophytes do not need water for fertilisation.
  • Bryophytes have gametophyte as dominant phase of life on which sporophyte is dependent whereas Pteridophytes have sporophyte as dominant phase but sporophyte is not dependent on gametophyte.
  • Heterospory is the formation of two types of spores which are different in size i.e. large spores and small spores. Large spores are called megaspores while small spores are called microspores. Spores are formed by the sporophyte both in bryophytes and pteridophytes.
Hence, option A is defines a character which is not same in bryophytes and pteridophytes.
So, the correct answer is 'Water requirement for fertilization'.

Multiple choice biology ecology species, communities and ecosystems kingdom fungi monera, protista, fungi

A taxonomic group of closely related genera is known as?

  1. Species

  2. Order

  3. Family

  4. Class
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Species represents a distinct group of the population that really or most likely breed from close animals. This taxonomic class is segregated from other classes through the method of reproduction. It bears minimal taxonomic traits.
It includes individuals that inherit basic similarities.It can be differentiated from other closely connected species because of idiosyncratic morphological characteristics. Option A is the answer
Multiple choice evs the journey of seeds vegetative propagation and seed dispersal seed dispersal seed dispersal and its methods

The seeds of ............ fruit are dry and dispersed by explosion due to the touch of our hands. 

  1. Cucumber

  2. Balsam

  3. Xanthium

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

  1. Cucumber needs insects like bees or other insects to disperse their seeds.
  2. Balsam seeds use explosion mechanism for seed dispersal.T he fruits are dry and light and easily ruptured even touch by hands.
  3. Xanthium also uses animals for seed dispersal the seed stuck to the body of animals and are very tough to remove.
  4. Calotropis widely use bees as the carrier for the dispersal of seeds.
So the correct option is  "Balsam".

Multiple choice biology micro - organism useful actions of algae introduction to algae algae

Agar is obtained from which of the following alga?

  1. $Sargassum$
  2. $Spirogyra$
  3. $Gelidium$
  4. $Chondrus$ $crispus$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Agar is a jelly-like substance, obtained from algae and discovered in the late 1650s or early 1660s. Agar is derived from the polysaccharide agarose, which forms the supporting structure in the cell walls of certain species of algae, and which is released on boiling. These algae are known as agarophytes and belong to the Rhodophyta (red algae) phylum. Agar is actually the resulting mixture of two components: the linear polysaccharide agarose, and a heterogeneous mixture of smaller molecules called agaropectin.The gelling agent in agar is an unbranched polysaccharide obtained from the cell walls of some species of red algae, primarily from the genera Gelidium and Gracilaria. For commercial purposes, it is derived primarily from Gelidium amansii. In chemical terms, agar is a polymer made up of subunits of the sugar galactose.

Multiple choice biology micro - organism useful actions of algae introduction to algae algae

An alga, very rich in protein, is

  1. Nostoc

  2. Ulothrix

  3. Chlorella

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

Chlorella is an alga with extremely important health benefits. It contains nearly 50% of proteins. It also contains certain essential amino acids. But because of its hard cell wall, it cannot be digested easily. So, it is available in the form of food supplements as tablets, capsules etc.

So, option C "Chlorella" is the correct answer.

Multiple choice biology micro - organism useful actions of algae introduction to algae algae

A thalloid red algae used for commercial production of agar-agar is

  1. Gelidium

  2. Cladophora

  3. Chlorella

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

Agar or agar-agar is a jelly-like substance, obtained from algae. The gelling agent in agar is an unbranched polysaccharide obtained from the cell walls of some species of red algae, primarily from the genera Gelidium and Gracilaria. For commercial purposes, it is derived primarily from Gelidium amansii. In chemical terms, agar is a polymer made up of subunits of the sugar galactose.

Multiple choice botany flower androecium and gynoecium flower: accessory parts and reproductive parts reproductive morphology

Which of the following statements are correct?
1. Rule of Priority in plant nomenclature commenced from $1853$
2. Binomial nomenclature was introduced by Linnaeus in $1753$
3. The orchid fruit contains five distinct seeds
4. Gynobasic style is found in Lamiaceae
Select the correct answer using the codes given.

  1. $1$ and $2$
  2. $2$ and $4$
  3. $1$ and $3$
  4. $2$ and $3$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

  1. The first rule commence for botanical nomenclature is in the year 1867 in Paris by A.P.de Candolle.
  2. Binomial nomenclature was given by Linnaeus in 1753.
  3. Orchids have the smallest seed in the world and produces millions in numbers.
  4. When style arises from the cavity from the centre of ovary or from thalamus is gynobasic style and it is the characteristic of Lamiaceae family.
So the correct statemnts are "2and 4".