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Plant classification - class-IX

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Fusion of two motile gametes which are dissimilar in size is termed as

  1. oogamy

  2. isogamy

  3. anisogamy

  4. zoogamy


Correct Option: C
Explanation:

Anisogamy is a type of sexual reproduction which involves the fusion of two dissimilar gametes.

Which of the following is a group which has only multicellular heterotrophic organisms?

  1. Fungi

  2. Algae 

  3. Protozoa

  4. All of the above


Correct Option: A
Explanation:

Fungi are the multicellular eukaryotic organisms. The kingdom Fungi has only heterotrophic organisms.

A. Fungi are heterotrophic.
B. Algae come under kingdom Plantae and they are mostly autotrophic.
C. Protozoa come under kingdom Protista which has unicellular organisms that are both autotrophic and heterotrophic.
Hence, the correct answer is 'Fungi'.

What happens as one moves from kingdom to species ?

  1. common characters decrease

  2. special characters increase

  3. closely related individuals come together

  4. All are correct


Correct Option: A

Classification of kingdom plantae includes

  1. Bryophytes, pteridophytes, angiosperms, gymnosperms

  2. Angiosperms, gymnosperms

  3. Bryophytes, pteridophytes

  4. Gymnosperms, pteridophytes


Correct Option: A
Explanation:

The Kingdom Plantae is also called as kingdom Metaphyta. The kingdom Plantae includes all types of eukaryotic, multicellular, photosynthetic plants found in this biosphere.

It includes bryophytes, pteridophytes, angiosperms, and gymnosperms.
This kingdom includes all types of plants like herbs, shrubs, trees, creepers, climbers, aquatic plants, desert plants, mountain plants, flowering, and nonflowering plants, etc.

Which of the following statements is correct about the kingdom Plantae?

  1. They are multicellular eukaryotes

  2. They are usually autotrophic

  3. Their cells have cell wall, made up of cellulose

  4. All of the above


Correct Option: D
Explanation:

The kingdom Plantae includes all plants i.e., trees, grasses, ferns and mosses, They are multicellular eukaryotes. They have nucleated cells. They have cell organelles like mitochondria and chloroplast. They contain chlorophyll and are capable of making their own food in presence of sunlight. So, they are called autotrophs. Their cells have distinct cellulose wall that other organisms lack. 

So, the correct answer is option D.

Most primitive member in which roots are not present is ____________.

  1. Psilotum

  2. Rhynia

  3. Lycopodium

  4. Selaginella


Correct Option: B
Explanation:
Rhynia is a single-species genus of Devonian vascular plants. Rhynia is more primitive than Psilotum and both lack true roots. 
So, correct answer is Rhynia.

Algae can be described as

  1. Autotrophic and chemosynthetic

  2. Autotrophic and photosynthetic

  3. Heterotrophic and photosynthetic

  4. Heterotrophic and chemosynthetic


Correct Option: B
Explanation:

Algae is the group of organisms which is comprised of the unicellular and the multicellular organisms. These organisms possess the chlorophyll pigments which help in the trapping of the solar energy. The plants can perform photosynthesis and prepare their own food. The plants are autotrophic and have the ability to produce their own food.

So, the correct answer is 'Autotrophic and photosynthetic'

Write the correlation.
Protista : Euglena : : Plantae : :

  1. Amoeba

  2. Paramoecium

  3. Green plants

  4. Bacteria


Correct Option: C
Explanation:

  • Euglena is an example of an organism belonging to the kingdom Protista. All green plants are included in the kingdom Plantae.

Therefore, the correct answer is option C.

Kingdom plantae include which of the following sub-kingdoms?

  1. Cryptogams and phanerogams

  2. Cryptogams and Porifera

  3. Thallophyta and Bryophyta

  4. Pteridophyta and Thallophyta


Correct Option: A
Explanation:

Cryptogams and phanerogams are the two sub-kingdoms of kingdom plantae.
Porifera is phylum of kingdom Animalia. Thallophyta, Bryophyta and Pteridophyta are the division of kingdom plantae.

Thus option A is correct.

Kingdom Plantae includes organisms that are

  1. Unicellular and eukaryotic

  2. Multicellular, eukaryotic and saprophytic

  3. Multicellular, eukaryotic and autotrophic

  4. Multicellular, eukaryotic and heterotrophic


Correct Option: C
Explanation:

Kingdom Plantae includes all multicellular eukaryotic organisms containing chlorophyll. They are autotrophs as they can make their own food with the help of solar energy. The cell wall of plants comprises of cellulose. They have the ability to grow by cell division. They lack motility. Thus, the correct option is C.

Which of the following statements about the distinction between plants and animals is false?

  1. Plants have cell wall made up of cellulose.

  2. Plants have intermediate larval stages.

  3. Plants are extensively branched.

  4. Animals are heterotrophic.

  5. All of the above.


Correct Option: B
Explanation:

Plants and animals though both livings are different in many ways. On considering the cell though the function is the same but structure is different, the plant cell has chloroplast which contains the green pigment chlorophyll. Besides this, the plant cell has a cell wall and large vacuole which are absent in  animal cells. However, in respect to the life cycle of plants and animals, many animals go through larval stages before they metamorphose into adults whereas plants do not have a larval stage. Thus, the correct answer is option B.

............ provides the rigid shape to plant cells.

  1. Cell membrane

  2. Cell wall

  3. Cytoskeleton

  4. Chloroplasts

  5. Centrioles


Correct Option: B
Explanation:

The peptidoglycan in the cell wall gives a rigid structure to the entire cell. The cell wall surrounding the cell gives shape to the cell and also prevents it from bursting.

An autotropic organism with cells that are organized into tissues and organs.

Which of the following organism includes these characteristics?

  1. Monera

  2. Protista

  3. Fungi

  4. Plantae

  5. Animalia


Correct Option: D
Explanation:

Kingdom monera includes unicellular organisms while kingdom Protista includes eukaryotic unicellular and simple multicellular organisms. Kingdoms fungi and animals include heterotrophic organisms. Kingdom Plantae includes autotrophic multicellular organisms that exhibit tissue or organ/organ system level of body organization. Thus, the correct answer is D.

An organism is examined and is found to be multicellular and heterotrophic and have cell walls made of a substance other than cellulose. The organism belongs to which of the following kingdoms?

  1. Monera

  2. Protista

  3. Fungi

  4. Plantae

  5. Animalia


Correct Option: C
Explanation:

Kingdom monera includes unicellular prokaryotic BGA and bacteria. Kingdom Protista includes eukaryotic unicellular organisms, algae and all protozoa. Kingdom fungi include multicellular, heterotrophic eukaryotes with the chitinous cell wall. Kingdom Plantae includes autotrophic organisms with cellulosic cell wall while kingdom Animalia includes heterotrophic organisms without the cell wall. The correct answer is C.

Which best explains why most plants appear green?

  1. They absorb green light.

  2. They do not absorb red light.

  3. They reflect blue light.

  4. They reflect green light.

  5. They generate wavelengths of green light when they absorb sunlight.


Correct Option: D
Explanation:
Plants appear green due to the presence of chlorophyll. Chlorophyll is a pigment present in the chloroplasts of the plants that absorbs in the blue and red region of light spectrum and reflects green light making the plants to look green. Thus, plants appear green because they reflect green light.
So, the correct answer is they reflect green light.

 Plants use polymers of glucose as storage molecules and as structural components in their cell walls. Which of the following polysaccharides would be found in a plant?
 I. Starch
 II. Glycogen
 III. Cellulose

  1. I only

  2. II only

  3. III only

  4. I and II only

  5. I and III only


Correct Option: E
Explanation:

Cellulose forms an integral part of the cell wall which provides strength and rigidity to the cell. It helps to maintain the structural integrity of a particular cell. Cellulose is a complex polysaccharide which is made up of  β(1→4) linked D-glucose units.

Starch is the important food reserve for the plants. The excess amount of glucose synthesized during dark reaction of photosynthesis is stored in food vacuoles of the plant which it again converted into a usable form of glucose in case of unfavorable conditions. It is a complex polysaccharide formed by 1,4-alpha linkage between two glucose unit.
So, the correct answer is option E.

The organelles found in 4 different types of cells are shown in the table below. Use the information in the table to answer the next 3 questions.
Cell Types and Their Characteristics

Cell Type Nucleus Mitochondria Cell Wall  Cell Membrane Chloroplast
1234 yesyesyes no yesyesyesno noyesyesyes yesyesyesyes noyes nono

Which cell type will undergo the process of photosynthesis?

  1. Cell 1 only

  2. Cell 2 only

  3. Cell 2 and 3 only

  4. Cell 3 only

  5. Cell 3 and 4 only


Correct Option: B
Explanation:
Photosynthesis occurs in chloroplasts. Chloroplasts are the green coloured plastids which contains various pigments necessary for photosynthesis.
Since only cell 2 has the chloroplast, so it will undergo the process of photosynthesis.
So, the correct answer is 'Cell 2 only'.

Archegoniatae include

  1. Bryophytes, Pteridophytes and Gymnosperms

  2. Pteridophytes, Gymnosperms and Angiosperms

  3. Algae, Fungi and Bryophytes

  4. Algae, Fungi and Bacteria


Correct Option: A
Explanation:

An archegonium is a multicellular structure or organ of the gametophyte phase of plants, producing and containing the ovum or female gamete. The archegonium has a long neck canal or venter and a swollen base. Archegonia are located on the surface of the plant thallus. Plants having archegonium is known as archegoniate. Bryophytes, pteridophytes and gymnosperms are archegoniate plants. so option A is correct.

Which of the following plant belongs to herbs?

  1. Rose

  2. Cotton

  3. Mustard

  4. All of the above


Correct Option: C

The two main categories of plants on the basis of whether they produce fruits or not are herbs and shrubs.

  1. True

  2. False


Correct Option: B

Which of the following called as amphibians of plant group?

  1. Algae

  2. Mosses

  3. Ferns

  4. Pine


Correct Option: B

Which of the following possess rhizomes?

  1. Spirogyra

  2. Ferns

  3. Pine

  4. Cycas


Correct Option: B

The plant which lives for several years called as

  1. Annual

  2. Biennials

  3. Perennials

  4. None of the above


Correct Option: C
Explanation:

A perennial plant or simply perennial is a plant that lives more than two years. Some sources cite perennial plants being plants that live more than three years. The term is often used to differentiate a plant from shorter-lived annuals and biennials.

Thus the correct answer is C. 

Which of the following differentiates mosses from ferns?

  1. Presence of roots

  2. Absence of roots

  3. Production of fruits

  4. Presence of flowers


Correct Option: B

Which of the following is an angiosperm?

  1. Sugarcane

  2. Pine

  3. Cedar

  4. Fir


Correct Option: A
Explanation:

Sugar cane is a perennial tropical grass with tall stout jointed stems from which sugar is extracted. Sugarcane is a flowering plant belonging to the monocotyledonous group of angiosperms. Angiosperms are also called as seed plants or flowering plants.

Thus the correct option is A. 

Cycas and Pinus belongs to 

  1. Thallophyta

  2. Bryophyta

  3. Pteridophyta

  4. None of the above


Correct Option: D
Explanation:
Cycas and Pinus are two genera belonging to gymnosperms.Cycas is a dioecious tree while Pinus is a monoecious tree.
So, the correct answer is  'None of above'

Chara belongs to 

  1. Gymnosperm

  2. Thallophyta

  3. Bryophyta

  4. Pteridophyta


Correct Option: B
Explanation:

Answer is B. Thallophyta

Biological classification of Chara :- 

Division :- Thallophyta 

Sub division :- Algae 

Class :- Charophyceae

Order :- Charales 

Family :- Characeae 

Genus :- Chara 

==>>Occurrence of Chara :-

This is a fresh water form, which generally grows submerged in water and remain attached to the bottom with the help of rhizoids. Some species like chara battica may be found in Saline water.

Identify the bryophyte(s) from the following.

  1. Riccia

  2. Moss

  3. Cycas

  4. Both A and B


Correct Option: D
Explanation:
Answer is D-A and B both
Riccia is a genus of liverworts in the order Marchantiales. These plants are small . The sporophyte of Riccia is the simplest amongst bryophytes.
mosses are non-vascular plants in the land plant division Bryophyta.

Mention whether the following statement is true or false:
Animals show movement while the plants do not

  1. True

  2. False


Correct Option: A
Explanation:

Plants are sedentary organisms, where as animals show movement due to the presence of locomotory organs.

So, the statement is ‘True’.

Which of the following is the characteristics of plants?

  1. Multicellular with specialised tissues and organs

  2. Photosynthetic and contain chlorophylls a and b

  3. Protect developing embryo from desiccation

  4. All of the above


Correct Option: D
Explanation:

Plants are green nonmotile stationery living beings that grow in the soil. These are multicellular and has specialized tissues and organ to perform the various function of the plant body. They helps to prepare their food by photosynthesis with the help of pigments chlorophyll a and chlorophyll b.

Desiccation is the drying of the cell and the specialized tissue of plants protect the developing embryo from desiccation.
So, the correct option is 'all of the above'.

Which of the following statements are correct?

  1. Fungi possess tissues

  2. Animals possess tissues

  3. Plantae possess tissues

  4. All of the above


Correct Option: D
Explanation:

Organisms of kingdom fungi have multicellular or loose tissue. In organisms of kingdom Plantae, the body organisation is tissue or organ grade whereas body organisation in kingdom Animalia is tissue or organ or organ system. In unicellular organisms, all functions like digestion, respiration and reproduction are performed by a single cell. In the complex body of multicellular animals, the same basic functions are carried out by different groups of cells in a well-organised manner. The body of a simple organism like Hydra is made of different types of cells and the number of cells in each type can be in thousands. The human body is composed of billions of cells to perform various functions. In multicellular organisms of fungi, plant and animal kingdoms, a group of similar cells perform a specific function. Such an organisation is called tissue.

The book 'Structure and Reproduction of the Algae' describing taxonomy of algae is written by 

  1. Whittaker

  2. Fritsch

  3. Trainer

  4. Chirstensen


Correct Option: B
Explanation:

The book 'Structure and Reproduction of the Algae' describing taxonomy of algae is written by Felix Eugen Fritsch FRS. He was a British biologist. He gave very comprehensive and authoritative account of classification of algae based on a variety of characters as pigmentation, stored food matter, habit, habitat and method of reproduction. 

Plant X has undifferentiated plant body.
Plant Y is a seedless vascular plant that is differentiated into stem, roots and leaves.
Plant Z is a plant bearing seeds.
Select the correct statement regarding X, Y, and Z.
  1. X can be an Angiosperm.

  2. Y can be Gymnosperm.

  3. Y can be a Thallophyte.

  4. Z can be angiosperms or Gymnosperms.


Correct Option: D
Explanation:

X can be thallophytes which have an undifferentiated plant body, that is, in the form of an undivided thallus. Algae are thallophytes belonging to kingdom Plantae. Fungi belong to kingdom Fungi. Y can be pteridophytes which are seedless vascular plants and differentiated into true stern, leaves and roots. Bryophytes are simple land plants with no true roots. The plant body is thallose or foliose. Z can be angiosperms or gymnosperms since both of them have seeds. However, angiosperms have seeds covered by fruit whereas gymnosperms have naked seeds. So, the correct answer is option D. 

Kingdom plantae shows two phases of life, gametophytic and

  1. Autotrophic

  2. Sporophytic

  3. Saprophytic

  4. Geophytic


Correct Option: B
Explanation:

Bryophytes are the plants in which the life cycle has two phases gametophytic and sporophytic, alternating to each other. This phenomenon is called alternation of generation. Gametophytic phase is haploid, autotrophic, gametes(male and female) formative and responsible for the sexual reproduction. Sporophytic phase is the subsidiary phase which is diploid, heterotrophic and spore formative and responsible for the asexual reproduction. For example, Riccia, Funaria.

So, the correct answer is option B.

Choose the correct answers from the alternatives given.
Into which of the following kingdoms would you place a multicellular land organism that carries on photosynthesis

  1. Animalia

  2. Plantae

  3. Fungi

  4. Protista


Correct Option: B
Explanation:

Kingdom Plantae includes all eukaryotic chlorophyllous autotrophic organisms. A few members are partially heterotrophic such as insectivorous plant or parasites. bladderwort and venus fly trap are examples of insectivorous plants and Cuscuta is a parasite. 

Hence, the correct answer is 'Plantae'.

Choose the correct answers from the alternatives given.
Plants are believed to have evolved from the

  1. euglenophytes, because they have chlorophyll a and b

  2. dinoflagellates, because they have similar storage products and cellulosic cell walls

  3. chlorophytes, because of similarities in chloroplasts and accessory pigments

  4. rhodophytes, because they have carotenoids and use floridean starch as a storage product


Correct Option: C
Explanation:

Chlorophyta is the green algae that contain the pigment chlorophyll A and chlorophyll b in the well-defined chloroplast. Plants are considered to have evolved from Chlorophyta because plants are green in color and they have chlorophyll A and chlorophyll b pigment just like the Chlorophyta family.

There is well-defined chloroplast which stores this pigment in plants.
So, the correct option is 'chlorophytes, because of similarities in chloroplasts and accessory pigments'

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