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Recent questions tagged botany
Questions
Which class of algae have chlorophyll-a.d,phycoerthrin and lack flagella?
cbse
class12
biology
botany
neet
sec-a
asked
Jan 25, 2017
by
meena.p
0
answers
Name the aquatic fern among the following:
cbse
class12
biology
botany
neet
sec-a
asked
Jan 25, 2017
by
meena.p
0
answers
Assertion: red colour of Rhododendron is due to an abundant formation of r-phycoerythrin <br> Reason: r-phycoerythrin is able to absorb green wavelength of light and reflect red colour
cbse
class12
biology
botany
neet
sec-a
asked
Jan 25, 2017
by
meena.p
0
answers
Which of the following characters represent affinities of Gnetum with Angiosperms and differences with Cycas and Pinus?
cbse
class12
biology
botany
neet
sec-a
asked
Jan 25, 2017
by
meena.p
2
answers
Which of the following is a symbiotic nitrogen fixer?
cbse
class12
biology
botany
neet
sec-a
asked
Jan 25, 2017
by
meena.p
0
answers
The term species was introduced by
cbse
class12
biology
botany
neet
sec-a
asked
Jan 25, 2017
by
meena.p
0
answers
Assertion: Natural habitats of plants should not be destroyed. Reason: this is necessary for conservation of biotic resources.
cbse
class12
biology
botany
neet
sec-a
asked
Jan 25, 2017
by
meena.p
0
answers
Which endangered animal is the source of the world’s lightest, warmest and most expensive wool, the shatoosh?
cbse
class12
biology
botany
neet
sec-a
asked
Jan 25, 2017
by
meena.p
1
answer
Deserts, grasslands, forests and tundras are examples of
cbse
class12
biology
botany
neet
sec-a
asked
Jan 25, 2017
by
meena.p
1
answer
Which of the following is not a producer?
cbse
class12
biology
botany
neet
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asked
Jan 25, 2017
by
meena.p
0
answers
In the given food web, an increase in the population of hawks will not result in
cbse
class12
biology
botany
neet
sec-a
asked
Jan 25, 2017
by
meena.p
1
answer
Praying Mantis is a good example of
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
1
answer
Which of the following is not a factor that would limit the growth of a population?
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
A behavioural strategy of adaptation called echolocation is found in
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
Assertion: Artificial seeds can be produced using tissue culture. <br> Reason: Artificial seeds can be strored and propagated just as natural seeds.
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
1
answer
Meristem culture is used to
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
1
answer
Match Column I with Column II and select the correct option from the codes given below
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
The enzyme that helps to cut one strand of DNA duplex to release tension of coiling of two strands is
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
1
answer
Assertion: A change in the nitrogen base at the third position of the codon causes change in the expression of the codon. <br>Reason: A codon is mostly read by all the three nitrogen bases.
cbse
class12
biology
botany
neet
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asked
Jan 24, 2017
by
meena.p
1
answer
Read the following statements: <br>i. One codon codes for aminoacid. <br>ii. Some amino acids are coded by more than one codon <br>iii. The sequence of triplet nitrogenous bases in DNA or mRNA corresponds to the amino acid sequence in the polypeptide chain. Given suitable terms for the characteristics of ‘genetic code’ as per the above statements
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
Drosophila flies with XXY genotype are females but human beings with such genotypes are abnormal males. It shows that
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
In the following pedigree chart, the mutant trait is shaded black. The gene responsible for the trait is
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
1
answer
Two or more independent genes present on different chromosomes that determine nearly the same phenotype are called
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
1
answer
Assertion: Only the pre pollination of the male gametophyte occurs inside the microsporangium where as the remaining growth occurs over the female reproductive organs. <br>Reason: Whorl of the female gametophyte occurs inside the megasporangium
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
Given below are the events that are observed in an artificial hybridization programme. Arrange them in a correct sequential order and select the correct option <br> 1. Bagging <br>2. Selection of parents <br>3. Bagging <br>4. Dusting of pollen on the stigma <br>5. Emasculation <br>6. Collection of pollen from male parent.
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
Pollen grains are able to tolerate extremes of temperature and dessication as its exine is made up of
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
1
answer
Senescent phase of an organism’s life span can be recognised by
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
1
answer
Refer to the given figures and select the correct option
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
Interfasicular cambium and cork cambium are due to
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
A farmer while growing grapes in his garden observes the following:<br> i. Fruit size normally remained small <br> ii. Natural seed abortion <br> iii. Reduced stem and leaf growth Which problem would be solved by application of gibberillic acid during the development of fruits?
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
Which one of the following exhibits highest rate of respiration?
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
Plants adapted to low intensity have
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
In PS-I, the first electron acceptor is
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
Assertion: Necosis occurs due to deficiency of Ca, Mg,Cu and K. <br> Reason: Necrosis is the death of the tissue, particularly leaf tissue
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
Match the column I with Column II and select the option given below
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
The given diagram depicts the cell plate method of cytokinesis in plant cells. Identify A,B and C
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
The two sub units of ribosome remain united at a critical ion level of 2008
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
Assertion: It is important that organisms have cells. <br>Reason: A cell keeps its chemical composition steady within its boundary
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
Cellulose , most important constiruent of plant cell wall is made up of
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
Who proposed fluid mosaic pattern of plasma membrane?
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
Identify A,B,C ,D in the given T.S. of leaf of Zea mays
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
Assertion: Avicennia has pneumatophores <br>Reason: Pneumatophores help the plant to get oxygen for respiration
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
Assertion: The outermost covering of a dicot seed is a seed coat. <br> Reason: The seed coat has two layers- Outer testa and inner hilum
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
1
answer
Hairy styles help in the dispersal of fruits in 1. Clematis <br> 2. Aristolochia <br> 3. Narvelia <br> 4. Mango
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
Which one of the following diagrams represent placentation in Dianthus?
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
1
answer
Moss plant is used as a packing material for sending flowers and live plants to distant places because
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
Select the incorrect statement w.r.t. given type of life cycle
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
1
answer
A living fossil of gymnosperm is
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
Which one is not a moss?
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
The given statement describe a group of organisms. <br> A.Instead of cell wall. They have protein rich pellicle making their body flexible. <br> B.They have 2 flagella- a short and a long one. <br> C.Form a connecting link between plants and animals. <br> D.Exhibit mixotrophic nutrition. Which of the following group is refreed here?
cbse
class12
biology
botany
neet
sec-a
asked
Jan 24, 2017
by
meena.p
0
answers
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