MCQExams
0:0:1
CBSE
JEE
NTSE
NEET
Practice
Homework
×
CBSE Questions for Class 11 Medical Biology Plant Kingdom Quiz 8 - MCQExams.com
CBSE
Class 11 Medical Biology
Plant Kingdom
Quiz 8
A single cell protein refers to
Report Question
0%
A specific protein extracted from pure culture of single type of cells
0%
Sources of mixed proteins extracted from pure or mixed culture of microorganisms or cells
0%
Proteins extracted from a single cell
0%
A specific protein extracted from a single cell
Explanation
Single cell protein (SCP) refers to both unicellular and multi-cellular organisms together used to convert biomass into edible food products. The sources of mixed proteins or biomass is extracted from pure or mixed cultures of algae, yeast, fungi or bacteria to produce protein-rich foodstuffs.
So, the correct answer is option B.
Unicellular green algae is
Report Question
0%
Ulothrix
0%
Spirogyra
0%
Chlamydomonas
0%
All of the above
Algae are autotrophic. Which of the following statement can be related to autotrophs?
Report Question
0%
Autotrophs prepares their own food
0%
Autotrophs depends on others for their food
0%
Autotrophs are insectivores
0%
None of these
Explanation
Algae are autotrophic means they prepare their own food.
To be more specific, they are photoautotrophic i.e they use light energy to prepare their own food.
Although some algae are heterotrophs, majority of them are capable of making their own food by themselves.
The correct answer is A.
Branch dealing with study of algae is
Report Question
0%
Phycology
0%
Mycology
0%
Microbiology
0%
Onchology
Explanation
Phycology is the scientific study of algae. It is also called algology. It is a branch of life science and often is regarded as a sub-discipline of botany.
Algae are important as primary producers in aquatic ecosystems. Hence, the branch dealing with the study of algae is phycology.
So, the correct answer is 'phycology'.
In isogamous species, the gametes of
Chlamydomonas
undergo temporary clustering before they depart in pairs. The phenomenon is called
Report Question
0%
Gametic differentiation
0%
Clumping
0%
Homothallism
0%
Parthenogenesis
Explanation
Clumping is a behavior in an organism, usually sessile, in which individuals of a particular species group close to one another for beneficial purposes.
Clumping can be caused by the abiotic environment surrounding an organism. Hence, In isogamous species, the gametes of Chlamydomonas undergo temporary clustering before they depart in pairs. The phenomenon is called Clumping.
So, the correct answer is "Clumping'.
Thin-walled resting spored produced by
Chlamydomonas
in dry conditions of environment are
Report Question
0%
Meiospores
0%
Aplanospores
0%
Hypnospores
0%
Zygospores
Explanation
Aplanospores are nonmotile asexual spores found in certain algae and fungi. They are formed from a part of a protoplast of a vegetative cell.
Aplanospores consists of a cell wall, which is different from the original parental cell wall, allowing the survival of the organism in harsh conditions. Hence, the Thin-walled resting spored produced by Chlamydomonas in dry conditions of the environment is Aplanospores.
So, the correct answer is "Aplanospores'.
Phycobilins absorbs light of wavelength
Report Question
0%
670 - 700 nm
0%
610 - 650 nm
0%
500 - 650 nm
0%
420 - 520 nm
Chloroplast of
Chlamydomonas
is
Report Question
0%
Cup-shaped
0%
Star-shaped
0%
Ribbon-shaped
0%
Lamellate
Oogamy is found in which of the following species of
Chlamydomonas
?
Report Question
0%
Chlamydomonas eugametos
0%
Chlamydomonas
monoica
0%
Chlamydomonas
coccifera
0%
Both A and B
Explanation
Oogamy or oogamous type of sexual reproduction is that sexual reproduction in which male gametes are very small as compare to female gametes and they can be motile or non-motile.
But female gametes are large as compare to male gametes and are non-motile.
Chlamydomonas coccifera
is oogamous.
Chlamydomonas eugametos
undergo isogamy.
Chlamydomonas monoica
undergoes homothallic sexual reproduction.
So, the correct option is 'C'.
In
Chlamydomonas,
the term hologamy is applied to a mode of sexual reproduction in which
Report Question
0%
Gametes are motile.
0%
Gametes are holozoic.
0%
The young unicellular thalli directly behave as gametes.
0%
The gametes are differentiated into male and female.
Explanation
The young unicellular thalli directly behave as gametes:
This type of reproduction is termed as hologamy in which direction the young thallus behaves as gamete and helps in the fertilization. Hence, In Chlamydomonas, the term hologamy is applied to a mode of sexual reproduction in which The young unicellular thalli directly behave as gametes.
So, the correct answer is "The young unicellular thalli directly behave as gametes'.
Chlamydomonas
shows
Report Question
0%
Isogamy
0%
Anisogamy
0%
Oogamy
0%
All of the above
Explanation
The algae reproduce by vegetative, asexual, and sexual methods.
Vegetative reproduction is by fragmentation. Asexual reproduction is by the production of different types of spores, the most common being the zoospores.
Sexual reproduction takes place through the fusion of two gametes. These gametes can be flagellated and similar in size. Such reproduction is called isogamous.
The fusion of two gametes dissimilar in size, as in species of is termed as anisogamous.
The fusion between one large, nonmotile (static) female gamete and a smaller, motile male gamete is termed oogamous, Hence, Chlamydomonas shows
Isogamy,
Anisogamy,
and Oogamy.
So, the correct answer is "All of the above'.
The colour of red snow is due to
Report Question
0%
Chlamydomonas sowiae
0%
Chlamydomonas nivalis
0%
Both A and B
0%
Spirogyra
Explanation
Chlamydomonas nivalis
is a unicellular red-colored photosynthetic green alga that is found in the snowfields of the alps and polar regions all over the world.
They are one of the main algae responsible for causing the phenomenon of watermelon snow, where patches of snow appear red or pink. Hence, the color of red snow is due to
Chlamydomonas nivalis
.
So, the correct answer is "
Chlamydomonas nivalis
'.
During zoospore formation,
Chlamydomonas
Report Question
0%
Develops a very thick wall
0%
Loses the chloroplast
0%
Loses flagella
0%
All of the above
A
Chlamydomonas
plant is left exposed in the mud. What would be its means of survival?
Report Question
0%
Formation of aplanospores
0%
Palmella stage
0%
Formation of hypnospores
0%
All of the above
Explanation
The palmella stage in Chlamydomonas is formed under unfavorable conditions as a shortage of water, excess salts, etc.
The protoplast of the parent cell divides to make many daughter protoplasts but they do not form zoospores. The parent cell wall gelatinizes to make a mucilaginous sheath around daughter protoplasts. Hence, A Chlamydomonas plant is left exposed in the mud. Palmella stage is a means of survival.
So, the correct answer is "Palmella stage'.
All algae have two photosynthetic pigments in common
Report Question
0%
Chlorophyll $$a$$ and chlorophyll $$b$$
0%
Chlorophyll $$b$$ and carotenes
0%
Chlorophyll $$a$$ and carotenes
0%
Phycobilins and carotenes
Explanation
The algae are divided into three main classes: Chlorophyceae, Phaeophyceae, and Rhodophyceae.
Chlorophyceae, Phaeophyceae, and Rhodophyceae have two photosynthetic pigments in common are Chlorophyll a and carotenes.
So, the correct answer is "Chlorophyll a and carotenes'.
A parasitic green algae is
Report Question
0%
Chlorella
0%
Ulva
0%
Cladophora
0%
Cephaleuros
Explanation
Cephaleuros parasiticus
is a plant pathogenic member of the Chlorophyta or green algae.
It infects several commercially important crops including tea.
So, the correct answer is "
Cephaleuros'.
An edible rhodophyte is
Report Question
0%
Polysiphonia
0%
Batrachospermum
0%
Porphyra
0%
Corallina
Red algae are similar to blue-green algae in possession of
Report Question
0%
Gas vacuoles
0%
Filamentous body
0%
Cell wall components
0%
Phycobilins
Explanation
Phycobilin occurs in 3 groups of algae :
Cyanobacteria, Rhodophyta, and cryptophycaece are largely responsible for their distinctive colors including blue-green, red, and yellow. Hence, Red algae are similar to blue-green algae in possession of Phycobilins.
So, the correct answer is "Phycobilins'.
The juvenile stage of the gametophyte of moss is
Report Question
0%
Green, filamentous and branched structure called protonema
0%
A tetraflagellate body
0%
Dorsoventrally flattened plate like body
0%
A colourless mass of tubular structures
Explanation
The predominant stage of the life cycle of a moss (Bryophyte) is the gametophyte which consists of two stages.
The first stage is the protonema stage, which develops directly from a spore. It is a creeping, green, branched and frequently filamentous stage.
The second stage is the leafy stage, which develops from the secondary protonema as a lateral bud. It consists of upright, slender axes bearing spirally arranged leaves attached to the soil through multicellular and branched rhizoids. This stage bears the sex organs.
So, the correct answer is option A.
The moss plants are characterised by
Report Question
0%
Presence of leaf like structures
0%
Absence of vascular tissue
0%
A filamentous juvenile gametophyte
0%
All the above
Explanation
Mosses belong to the division Bryophyta.
The protonema (a filamentous juvenile gametophyte) is the first part of the moss that develops from the germinating spore.
The protonema will eventually produce leafy shoots.
Mosses are spore-producing plants that do not have vascular tissue.
So, the correct answer is option D.
Meiosis takes place in
Chlamydomonas
in
Report Question
0%
Zygospore
0%
Zoospore
0%
Hypnospores
0%
Aplanospores
Explanation
Chlamydomonas is an example of algae with the haplontic life cycle.
The haplontic life forms produce the gametes through mitosis. After fertilization, a zygote is formed.
In the case of Chlamydomonas, zygospore represents diploid zygote.
This zygospore is the only diploid cell in the entire lifecycle. It is thus that same zygospore that later undergoes meiosis to form haploid offspring.
So, the correct option is 'Zygospore'.
First land inhabitating plants are
Report Question
0%
Pteridophytes
0%
Bryophytes
0%
Gymnosperms
0%
Angiosperms
Explanation
Bryophytes are considered as the first land inhabiting plants.
Algae are exclusively aquatic whereas bryophytes are mostly terrestrial but depend on water for fertilization.
Hence, they are called amphibians of the plant kingdom and hence the link between aquatic and terrestrial plants.
Thus, the correct option is B.
The cells of
Spirogyra
differs from that of
Chlamydomonas
in
Report Question
0%
Presence of cellulose cell wall
0%
Presence of central vacuole
0%
Form of chloroplasts
0%
Both A and B
Explanation
Chloroplasts are cup-shaped in the case of
Chlamydomonas
whereas
Spirogyra
possesses spiral chloroplasts. Hence, The cells of Spirogyra differ from that of
Chlamydomonas
in the form or structure of chloroplasts.
So, the correct answer is "Form of chloroplasts'.
Antherozoids of moss are
Report Question
0%
Short, curved and biflagellate
0%
Rod-shaped, biciliate
0%
Short and multiflagellate
0%
Long and multiciliate
Green alga which can be used as an article of food due to its very high nutrient value is
Report Question
0%
Chlamydomonas
0%
Chlorella
0%
Ulothrix
0%
Volvox
Explanation
Algae are useful to man in a variety of ways. At least half of the total carbon dioxide fixation on earth is carried out by algae through
photosynthesis.
Chlorella
a
unicellular alga rich in proteins is used as a food supplement even by space
travelers. Hence,
Green alga which can be used as an article of food due to its very high nutrient value is
Chlorella.
So, the correct answer is "
Chlorella'.
A rhodophyte found in fresh water and without red colouration is
Report Question
0%
Polysiphonia
0%
Gelidium
0%
Batrachospermum
0%
Porphyra
In which of the following sexual reproduction is unknown?
Report Question
0%
Chlorella
0%
Spirogyra
0%
Chlamydomonas
0%
Ulva
Explanation
All the given organisms belong to the phylum Chlorophyta. These are green and photosynthetic.
Chlorella reproduces asexually through autospores, which are made within the body of the parent itself. These spores germinate to give rise to Chlorella.
Thus the correct answer is option A.
Diploxylic vascular bundles are found in
Report Question
0%
Cycas
0%
Selaginella
0%
Dryopteris
0%
Funaria
Rolling algae is
Report Question
0%
Volvox
0%
Chlamydomonas
0%
Chlorella
0%
Spirogyra
A thallus refers to plant body having
Report Question
0%
Vascular system
0%
Stem and leaves but no roots
0%
Root and stem but no leaves
0%
No distinction of stem, leaves and roots
Explanation
The term thallus is a botanical term that refers to the body of a plant that does not have leaves, stems, and roots.
A thallus is composed of filaments or plates of cells and ranges in size from a unicellular structure to a complex tree-like form.
Hence, A thallus refers to a plant body having no distinction of stem, leaves, and roots. Option D is correct.
Transfusion tissue, a modified vascular tissue is found in leaves of
Report Question
0%
Dryopteris
and
Selaginella
0%
Pinus
and
Cycas
0%
Porella
and
Funaria
0%
Dalbergia
and
Mangifera
Chlamydomonas
differs from
Spirogyra
and
Ulothrix
in having
Report Question
0%
Glycoprotein instead of cellulose in cell wall
0%
Neither chlorophyll $$a$$ nor chlorophyll $$b$$
0%
No cell wall
0%
Chlorophyll $$a$$ and chlorophyll $$d$$
Explanation
Chlamydomonas differs from spirogyra and Ullothrix
in having Glycoprotein instead of cellulose in cell wall
other eukaryotic cell walls Algal
cell walls contain
either polysaccharides or a variety of Glycoproteins
or both.
Coenobium occurs in
Report Question
0%
Spirogyra
0%
Ulothrix
0%
Volvox
0%
Chlorella
Explanation
Volvox thallus is a motile colony with definite shape and number of cells. This habit of thallus is called coenobium.
The colony is hollow, spherical or oval in shape and the size of colony is about the size of a pin head. The number of cells in a colony is fixed. Depending upon the species of Volvox the cells can be 500-60,000. The central part of colony is mucilaginous and the cells are arranged in a single layer on periphery of the colony.
Hence the correct option is C.
Red algae differs from green and brown algae in
Report Question
0%
Absence of chlorophyll $$a$$
0%
Phycobilin
0%
Not having any flagellate stage
0%
All the above
Explanation
Red, brown and green algae all possess chlorophyll a.
Phycobilin pigment is present in red algae while absent in green and brown algae.
Motile stage (flagellated stage) is not present in red algae, while in brown algae 2 flagella lateral and unequal are present and in green algae 2-8 apical and equal flagella are present.
So, the correct answer is options B and C.
Alga that is useful for prolonged space flight for liberation of oxygen, consumption of $$C{O}_{2}$$, disposal of wastes and formation of food is
Report Question
0%
Ulva
0%
Caulerpa
0%
Chlorella
0%
Chlamydomonas
Carpogonium is
Report Question
0%
Female gametophyte
0%
Female sex organ
0%
Fructification formed over female sex organ
0%
All of the above
Explanation
Female sex organ, called a carpogonium, consists of a uninucleate region that functions as the egg and a trichogyne, or projection, to which male gametes become attached.
Therefore B is the correct option.
Which of the following statement supports the fact that studying about algae is important?
Report Question
0%
They are good experimental materials
0%
They may become important constituent of future food for human beings
0%
They can be easily grown in water tanks
0%
They renew oxygen of atmosphere and water
Thallus of
Anthoceros
is
Report Question
0%
Dichotomously branched
0%
Irregularly branched
0%
Unbranched
0%
Foliaceous
Reproduction by autospores occurs in
Report Question
0%
Volvox
0%
Ulva
0%
Spirogyra
0%
Chlorella
In moss, stomata occur on
Report Question
0%
Stem
0%
Leaves
0%
Capsule
0%
All the above
Number of integuments present in the ovule of
Pinus
/
Cycas
is
Report Question
0%
Two
0%
Three
0%
One
0%
Four
Tetrasporophyte is found in
Report Question
0%
Laminaria
0%
Ulva
0%
Gelidium
0%
Sargassum
Explanation
Tetraspores are red algae spores produced by the tetrasporophyte (diploid) phase in the life history of algae in the Rhodophyta as a result of meiosis.
The name is derived from the 4 spores that form after this meiosis, the division is of three kinds: cruciate, zonate, and tetrahedral. Hence, Tetrasporophyte is found in
Gelidium
.
So, the correct answer is "
Gelidium
'.
In cycas, the endosperm is
Report Question
0%
Sporophytic structure
0%
Gametophytic structure
0%
New structure
0%
Formed after fertilisation
In
Cycas
, pollination is done by
Report Question
0%
Wind
0%
Insect
0%
Water
0%
Both A and B
Cycas
has the largest
Report Question
0%
Ovule
0%
Egg
0%
Sperm
0%
All the above
The structure that ruptures for dehiscence in moss capsule is
Report Question
0%
Operculum
0%
Annulus
0%
Peristome
0%
Calyptra
Explanation
Operculum/lid is connected to the theca region by annulus. Internally the two are separated by peristome. Annulus dries and separates like a circular band holding the operculum and theca
So, the correct answer is 'Annulus'
Moss peristome takes part in _______.
Report Question
0%
Spore dispersal
0%
Photosynthesis
0%
Protection
0%
Absorption
Explanation
The peristome is a specialized structure found in the sporangium of mosses that is responsible for spore discharge.
Hence, the correct answer is option A, i.e., Spore dispersal.
On germination a moss spore produces
Report Question
0%
Protonema
0%
Leafy gametophyte
0%
Sporogonium
0%
Sporophyte
Which one has the largest gametophyte?
Report Question
0%
Cycas
0%
Angiosperm
0%
Selaginella
0%
Moss/
Polytrichum
Explanation
The whole moss plant is a gametophyte, naturally larger than the gametophyte of vascular plants where the plant body is sporophyte.
So the correct option is D.
Spermatozoid of cycas is
Report Question
0%
Biflagellate
0%
Nonflagellate
0%
Uniflagellate
0%
Multiflagellate
0:0:1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
0
Answered
0
Not Answered
0
Not Visited
Correct : 0
Incorrect : 0
Report Question
×
What's an issue?
Question is wrong
Answer is wrong
Other Reason
Want to elaborate a bit more? (optional)
Practice Class 11 Medical Biology Quiz Questions and Answers
<
>
Support mcqexams.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page
