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Recent questions tagged botany
Questions
Why is Agarobacterium mediated genetic engineering transformation in plants is considered as a natural genetic engineering?
cbse
class12
biology
botany
sec-c
asked
Dec 19, 2016
by
meena.p
1
answer
What is biogas? How is it produced and name the microbes involved in the biogas production?
cbse
class12
biology
botany
sec-c
asked
Dec 19, 2016
by
meena.p
1
answer
Continued self pollination leads to interbreeding depression. List three devices that flowering plants have developed to discourage self pollination.
cbse
class12
biology
botany
sec-c
asked
Dec 19, 2016
by
meena.p
1
answer
Give any two examples of defense mechanism in plants against herbivory.OR What are the four levels of biological organization with which ecology basically deals with?
cbse
class12
biology
botany
sec-b
asked
Dec 8, 2016
by
meena.p
1
answer
What are auto immune diseases? Give two examples.
cbse
class12
biology
botany
sec-b
asked
Dec 8, 2016
by
meena.p
1
answer
Why are cleistogamous flowers invariably autogamous?
cbse
class12
biology
botany
sec-b
asked
Dec 8, 2016
by
meena.p
1
answer
Define standing crop.
cbse
class12
biology
botany
sec-a
asked
Dec 8, 2016
by
meena.p
1
answer
Give the scientific name of the causative organism of elephantiasis.
cbse
class12
biology
botany
sec-a
asked
Dec 8, 2016
by
meena.p
1
answer
How do plants and animals adapt to water scarcity?OR Explain briefly the ‘rivet popper hypothesis’ by Paul Ehrlich.
cbse
class12
biology
botany
sec-e
asked
Dec 8, 2016
by
meena.p
1
answer
Mention the three major causes for the loss of bio diversity.
cbse
class12
biology
botany
sec-c
asked
Dec 8, 2016
by
meena.p
1
answer
What is the pyramid of biomass? Represent the pyramid of biomass in a )grassland ecosystem b) aquatic ecosystem
cbse
class12
biology
botany
sec-c
asked
Dec 8, 2016
by
meena.p
1
answer
How will you obtain a purified DNA from a cell?
cbse
class12
biology
botany
sec-c
asked
Dec 8, 2016
by
meena.p
1
answer
Biofortification is the most practical means to improve human health. Justify the statement with examples.What is mutation? Explain the significance of mutation in plant breeding. Give an example of a disease resistant variety of cultivated plant induced by mutation.
cbse
class12
biology
botany
sec-c
asked
Dec 8, 2016
by
meena.p
1
answer
Explain test cross with an example and a Punnet squares
cbse
class12
biology
botany
sec-c
asked
Dec 8, 2016
by
meena.p
1
answer
Illustrate schematically the process of initiation, elongation and termination during transcription of a gene in a bacterium.
cbse
class12
biology
botany
sec-c
asked
Dec 8, 2016
by
meena.p
1
answer
List the changes that occur during post fertilization in plants.
cbse
class12
biology
botany
sec-c
asked
Dec 7, 2016
by
meena.p
1
answer
Why is productivity of coral reef maximum?
cbse
class12
biology
botany
sec-b
asked
Dec 7, 2016
by
meena.p
1
answer
Why pollen grains can remain well preserved in fossils?
cbse
class12
biology
botany
sec-b
asked
Dec 7, 2016
by
meena.p
1
answer
Define stratification
cbse
class12
biology
botany
sec-a
asked
Dec 7, 2016
by
meena.p
1
answer
What genetic principle would be derived from a monohybrid cross?
cbse
class12
biology
botany
sec-a
asked
Dec 7, 2016
by
meena.p
1
answer
Deforestation is creating a lot of problems in the environment. List the consequences of deforestation.
cbse
class12
biology
botany
sec-c
asked
Dec 7, 2016
by
meena.p
1
answer
Name the four major ecosystem services? Who gave the price tags on nature’s life support services? Which is the most important ecosystem service provided?
cbse
class12
biology
botany
sec-c
asked
Dec 7, 2016
by
meena.p
1
answer
What are the three critical areas of research in bio technology?
cbse
class12
biology
botany
sec-c
asked
Dec 7, 2016
by
meena.p
1
answer
Since DNA is hydrophilic, it cannot pass through the cell membrane. Name and explain the technique that DNA is forced into a) bacterial cell b) a plant cell c) an animal cell.
cbse
class12
biology
botany
sec-c
asked
Dec 6, 2016
by
meena.p
1
answer
What are bio fertilizers? A farmer was advised to add a culture of the bacterium in the soil before sowing the crop. Name the bacterium in the culture. How is this bacterium useful to the crop?
cbse
class12
biology
botany
sec-c
asked
Dec 6, 2016
by
meena.p
1
answer
In Antirrhinum majus, a plant with red flower was crossed with white flowers. Work out all the possible genotypes and phenotypes of $F_1$ and $F_2$ generations. Comment on the pattern of inheritance in this case. or Enlist the goals of Human Genome Project.
cbse
class12
biology
botany
sec-c
asked
Dec 6, 2016
by
meena.p
1
answer
Study the pie-diagram and answer the questions which follows : What do A, B, C and D represent in these diagrams.
cbse
class12
biology
botany
sec-b
asked
Dec 6, 2016
by
meena.p
1
answer
Why are cyanobacteria considered useful in paddy plants?
cbse
class12
biology
botany
sec-b
asked
Dec 6, 2016
by
meena.p
1
answer
Expand IUCN and MAB.
cbse
class12
biology
botany
sec-a
asked
Dec 6, 2016
by
meena.p
1
answer
Name the process in which unwanted mRNA regions are removed and wanted regions are joined.
cbse
class12
biology
botany
sec-a
asked
Dec 6, 2016
by
meena.p
1
answer
Mention the tools required for genetic engineering technology.
cbse
class12
biology
botany
sec-c
asked
Dec 5, 2016
by
meena.p
1
answer
Plasmid is a boon to biotechnology. Justify your statement quoting the production of human insulin as an example.
cbse
class12
biology
botany
sec-c
asked
Dec 5, 2016
by
meena.p
1
answer
Describe any three vector less methods of introducing rDNA into a competent host cell.
cbse
class12
biology
botany
sec-c
asked
Dec 5, 2016
by
meena.p
1
answer
What is mutation? Explain the significance of mutation in plant breeding. Give an example of disease resistant variety of cultivated plants induced by mutation.
cbse
class12
biology
botany
sec-c
asked
Dec 5, 2016
by
meena.p
1
answer
Explain how hnRNA becomes mRNA?
cbse
class12
biology
botany
sec-c
asked
Dec 2, 2016
by
meena.p
1
answer
In Mendel’s breeding experiment on garden pea, the offspring in $F_2$ generation are obtained in the ratio of $25\%$ pure yellow pod, $50\%$ hybrid green pods and $25\%$ green pods. State a)Which pod is dominant? b)The phenotype of the individuals of $F_1$ generation. c)Work out the cross.
cbse
class12
biology
botany
sec-c
asked
Dec 2, 2016
by
meena.p
1
answer
Why is secondary succession faster than primary succession?
cbse
class12
biology
botany
sec-b
asked
Dec 2, 2016
by
meena.p
1
answer
What is bio fortification?
cbse
class12
biology
botany
sec-a
asked
Dec 2, 2016
by
meena.p
1
answer
Who isolated restriction enzymes for the first time?
cbse
class12
biology
botany
sec-a
asked
Dec 2, 2016
by
meena.p
1
answer
Describe the inheritance of the flower colour in snap dragon. Taking the examples of ABO blood group types of humans, explain the phenomenon of multiple alleles and co dominance.
cbse
class12
biology
botany
sec-e
asked
Dec 2, 2016
by
meena.p
1
answer
What is RNA silencing? How is this strategy used to create pest resistant plants?
cbse
class12
biology
botany
sec-c
asked
Dec 2, 2016
by
meena.p
1
answer
Name the genes responsible for making Bt.cotton plants resistant to boll worm attack. How do such plants attain resistance against bollworm attack?
cbse
class12
biology
botany
sec-c
asked
Dec 2, 2016
by
meena.p
1
answer
Mention the important properties which a good vector must possess. The important properties of a good vector are:
cbse
class12
biology
botany
sec-c
asked
Dec 2, 2016
by
meena.p
1
answer
Fill in the blanks a,b,c,d,e and f in the following table:
cbse
class12
biology
botany
sec-c
asked
Dec 2, 2016
by
meena.p
1
answer
What is micro propagation? Why are plants produced by this technique called soma clones? Name any two food plants that are produced on commercial basis using this method?
cbse
class12
biology
botany
sec-c
asked
Dec 2, 2016
by
meena.p
1
answer
State Hardy-Weinberg principle. When there is a disturbance in the Hardy-Weinberg equilibrium, what would it result in? According to this principle, what is the sum total of all allelic frequencies?
cbse
class12
biology
botany
sec-c
asked
Nov 30, 2016
by
meena.p
1
answer
Why do leaves of xerophytes contain sunken stomata?
cbse
class12
biology
botany
sec-a
asked
Nov 30, 2016
by
meena.p
1
answer
Name the substance used as a medium in gel electrophoresis.
cbse
class12
biology
botany
sec-a
asked
Nov 30, 2016
by
meena.p
1
answer
When is the tumour referred to as malignant?
cbse
class12
biology
botany
sec-a
asked
Nov 30, 2016
by
meena.p
1
answer
Give the initiation codon for protein synthesis. Name the amino acid it codes for.
cbse
class12
biology
botany
sec-a
asked
Nov 30, 2016
by
meena.p
1
answer
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