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Recent questions tagged sec-b
Questions
A mother with blood group ${=}^{B'}$ has a fetus with blood group $-A'$ father is ${=}^{A'}$. Explain the situations?
cbsc
class 12
biology
principles of inheritance
sec-b
asked
Apr 23, 2019
by
priyanka.clay6
1
answer
What do you mean by competitive release?
cbsc
class 12
biology
organisms and population
sec-b
asked
Apr 23, 2019
by
priyanka.clay6
1
answer
What adaptation have parasites evolved?
cbsc
class 12
biology
organisms and population
sec-b
asked
Apr 23, 2019
by
priyanka.clay6
1
answer
What characteristic of soil determine the vegetation? How are these different at different places ?
cbsc
class 12
biology
organisms and population
sec-b
asked
Apr 23, 2019
by
priyanka.clay6
1
answer
Which is the deepest dwelling algae- red, green or brown, why?
cbsc
class 12
biology
organisms and population
sec-b
asked
Apr 23, 2019
by
priyanka.clay6
1
answer
What is the importance of light for organisms? How do deep sea organisms get their energy ?
cbsc
class 12
biology
organisms and population
sec-b
asked
Apr 23, 2019
by
priyanka.clay6
1
answer
How does temperature affect distribution of animals? Name two types based on their temperature tolerance.
cbsc
class 12
biology
organisms and population
sec-b
asked
Apr 23, 2019
by
priyanka.clay6
1
answer
How are the four levels of biological organisations in ecology interrelated ?
cbsc
class 12
biology
organisms and population
sec-b
asked
Apr 23, 2019
by
priyanka.clay6
1
answer
How have plants developed defence against predators ?
cbsc
class 12
biology
organisms and population
sec-b
asked
Apr 23, 2019
by
priyanka.clay6
1
answer
How have prey reduced impact of predation ?
cbsc
class 12
biology
organisms and population
sec-b
asked
Apr 23, 2019
by
priyanka.clay6
1
answer
What is Gause Competitive Exclusion Principle?
cbsc
class 12
biology
organisms and population
sec-b
asked
Apr 23, 2019
by
priyanka.clay6
1
answer
At high altitudes places like Manali or Mansarover we suffer from altitudes sickness this is because in low atmospheric pressure, body does not get enough oxygen, but gradually the problem is over. How did our body solve this problem?
cbsc
class 12
biology
organisms and population
sec-b
asked
Apr 23, 2019
by
priyanka.clay6
1
answer
List four features which enable the Xeric plants to survive in the desert conditions.
cbsc
class 12
biology
organisms and population
sec-b
asked
Apr 23, 2019
by
priyanka.clay6
1
answer
Mention the attributes which a population has but not an individual organism.
cbsc
class 12
biology
organisms and population
sec-b
asked
Apr 23, 2019
by
priyanka.clay6
1
answer
Differentiate between stenohaline and euryhaline organisms.
cbsc
class 12
biology
organisms and population
sec-b
asked
Apr 23, 2019
by
priyanka.clay6
1
answer
Generally thermo regulation is energetically expensive for many organisms. So, many smaller animals are rarely found in extreme hot or cold climatic condition. Why? Write two specific reasons.
cbsc
class 12
biology
organisms and population
sec-b
asked
Apr 23, 2019
by
priyanka.clay6
1
answer
1920's, in Australia, the prickly pear cactus caused havoc by spreading rapidly over millions of hectares of rangeland. How it was brought In the early under control. What term is used for such methods of controlling the prey?
cbsc
class 12
biology
organisms and population
sec-b
asked
Apr 23, 2019
by
priyanka.clay6
1
answer
"Snow leopards are not found in Kerala forests and tuna fish are rarely found beyond tropical latitude in the ocean". Study the above two cases and states the possible reasons for the same.
cbsc
class 12
biology
organisms and population
sec-b
asked
Apr 23, 2019
by
priyanka.clay6
1
answer
If a marine fish is placed in fresh water aquarium, will the fish be able to survive? Why?
cbsc
class 12
biology
organisms and population
sec-b
asked
Apr 23, 2019
by
priyanka.clay6
1
answer
Study the graphical representation shown below and mention the conditions responsible for the curves 'a' and 'b' respectively.
cbsc
class 12
biology
organisms and population
sec-b
asked
Apr 23, 2019
by
priyanka.clay6
1
answer
Kangaroo rats can survive in the absence of an external source of water. How do they adapt themselves to such conditions?
cbsc
class 12
biology
organisms and population
sec-b
asked
Apr 19, 2019
by
priyanka.clay6
1
answer
a) Which type of growth curve does it represent? <br> b) What do the notations represent in the given equation? <br> $\frac{dN}{dt} = rN [\frac{K-N}{K}]$
cbsc
class 12
biology
organisms and population
sec-b
asked
Apr 19, 2019
by
priyanka.clay6
1
answer
What does central dogma state in molecular biology? How does it differ in some viruses?
cbsc
class 12
biology
molecular basis of inheritance
sec-b
asked
Apr 19, 2019
by
priyanka.clay6
1
answer
Differentiate between VNTR and a probe.
cbsc
class 12
biology
molecular basis of inheritance
sec-b
asked
Apr 19, 2019
by
priyanka.clay6
1
answer
How do histones acquire positive charge?
cbsc
class 12
biology
molecular basis of inheritance
sec-b
asked
Apr 19, 2019
by
priyanka.clay6
1
answer
Differentiate between cistron and exon.
cbsc
class 12
biology
molecular basis of inheritance
sec-b
asked
Apr 19, 2019
by
priyanka.clay6
1
answer
What is satellite DNA in a genome? Explain their role in DNA fingerprinting.
cbsc
class 12
biology
molecular basis of inheritance
sec-b
asked
Apr 19, 2019
by
priyanka.clay6
1
answer
What is the genetic basis for proof that codon is a triplet and is read in a contiguous manner without punctuations?
cbsc
class 12
biology
molecular basis of inheritance
sec-b
asked
Apr 18, 2019
by
priyanka.clay6
1
answer
Why is DNA a better genetic material when compared to RNA?
cbsc
class 12
biology
molecular basis of inheritance
sec-b
asked
Apr 18, 2019
by
priyanka.clay6
1
answer
What is the function of non-histone chromosomal proteins?
cbsc
class 12
biology
molecular basis of inheritance
sec-b
asked
Apr 18, 2019
by
priyanka.clay6
1
answer
Differentiate between euchromatin and heterochromatin.
cbsc
class 12
biology
molecular basis of inheritance
sec-b
asked
Apr 18, 2019
by
priyanka.clay6
1
answer
A point mutation leads to adverse change in the function of hemoglobin (B globin chain). Identify the disease that may occur due to this mutation. Mention the change of amino acids in the polypeptide due to this mutation.
cbsc
class 12
biology
molecular basis of inheritance
sec-b
asked
Apr 18, 2019
by
priyanka.clay6
1
answer
Three enzymes required for metabolism of lactose, what would happen to the Machinery of the operon if mutation occur in z-gene.
cbsc
class 12
biology
molecular basis of inheritance
sec-b
asked
Apr 18, 2019
by
priyanka.clay6
1
answer
What are the untranslated regions (UTRs) ?
cbsc
class 12
biology
molecular basis of inheritance
sec-b
asked
Apr 18, 2019
by
priyanka.clay6
1
answer
What is frame shift mutation ? Name the type of mutation that does not affect protein synthesis.
cbsc
class 12
biology
molecular basis of inheritance
sec-b
asked
Apr 18, 2019
by
priyanka.clay6
1
answer
What are the functions of DNA polymerase ?
cbsc
class 12
biology
molecular basis of inheritance
sec-b
asked
Apr 18, 2019
by
priyanka.clay6
1
answer
What is meant by semi conservative nature of DNA replication ?
cbsc
class 12
biology
molecular basis of inheritance
sec-b
asked
Apr 18, 2019
by
priyanka.clay6
1
answer
Lactic Acid Bacteria (LAB) is commonly used in the conversion of milk into curd. Mention any two other functions of LAB that are useful to humans.
cbsc
class 12
biology
microbes in humans welfare
sec-b
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Name two alcoholic drinks produced in each of the following ways. <br> (i) by distillation and <br> (ii) without distillation.
cbsc
class 12
biology
microbes in humans welfare
sec-b
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Bacteria that convert effluent into activated sludge play one more beneficial side. Mention the role.
cbsc
class 12
biology
microbes in humans welfare
sec-b
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
It was observed that certain plant roots are infected by fungus. in spite of this infection the plant showed increased growth and development. Give reason.
cbsc
class 12
biology
microbes in humans welfare
sec-b
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
A farmer was suggested to apply certain microbial culture in his field to increase the yield. Suggest the types of microbes he could use in his paddy field and how do they help in increasing the yield.
cbsc
class 12
biology
microbes in humans welfare
sec-b
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
(a) Patients who have undergone myocardial infarction are given clot buster. Mention the clot buster administered and its microbial source. <br> (b) A person recuperating from illness is advised to have curd regularly. Why?
cbsc
class 12
biology
microbes in humans welfare
sec-b
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Explain the significant role of the genus Nucleopolyhedrovirus in an ecological sensitive area.
cbsc
class 12
biology
microbes in humans welfare
sec-b
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Explain the process of secondary treatment given to the primary effluent up to the point it shows significant change in the level of biological oxygen demand (BOD) in it.
cbsc
class 12
biology
microbes in humans welfare
sec-b
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
During the secondary treatment of primary effluents, how does a significant decrease in BOD occur?
cbsc
class 12
biology
microbes in humans welfare
sec-b
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Name the enzyme produced by Streptococcus bacterium. Explain its importance in medical sciences.
cbsc
class 12
biology
microbes in humans welfare
sec-b
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Why are some molecules called bioactive molecules? Give two examples of such molecules.
cbsc
class 12
biology
microbes in humans welfare
sec-b
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Name the source of statin and state its action on the human body.
cbsc
class 12
biology
microbes in humans welfare
sec-b
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Name the source of streptokinase. How does this bioactive molecule function in our body?
cbsc
class 12
biology
microbes in humans welfare
sec-b
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
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