NCERT Solutions
Board Paper Solutions
Ask & Answer
School Talk
Login
GET APP
Login
Create Account
Popular
Latest
Ritesh Ranjan Rath
Subject: Biology
, asked on 2/5/18
Solve this:
Q.2.8 A glass plate is coated with a layer of agarose gel. A central well and four surrounding wells (M, N, O, P) are cut on the agarose as shown in the figure on the right side. A mixture of x and y antibodies is added in the central well that react specifically with antigens X and Y, respectively. Wells M and N contain the antigen X. Wells P and O contain antigens of unknown identity. All the antigens and antibodies can diffuse through the agarose. The plate is then incubated for 48 hours. White lines of precipitates are formed in between the antigen and antibody wells as shown in the figure. Which of the following is likely to cause this?
(A) antigen Y in both O and P
(B) antigen X in both O and P
(C) antigen X in O and Y in P
(D) antigen Y in O and X in P
Answer
1
Aditi
Subject: Biology
, asked on 22/3/18
Solve this:-
explain meaning of (ii) point of mutualism.
(ii):- Mediterranean orchid Opbrys employs ' sexual decent' to get pollinated by a species of bee. One petal of its flower bears an uncanny resemblance to the female of the bee is size, colour and markings. The male bee is attracted to what it perceives as a female and 'pseudocopulates' with the flower. During this process, pollen are dizzed from the flower onto the male bee. When the same bee pseudocopulates with another flower, it transfer pollen to and thus pollinates the flower.
Answer
1
Shivam Sharma
Subject: Biology
, asked on 13/3/18
Why are mango trees unable to grow in temperate climates
Answer
1
Sandra Saju
Subject: Biology
, asked on 8/2/18
How does an age pyramid for human population at given point of time helps the policy-makers in planning for future?
Answer
1
Sandra Saju
Subject: Biology
, asked on 8/2/18
In certain seasons we sweat profusely while in some other season we shiver. Explain.
Answer
1
Gunjan Behwal
Subject: Biology
, asked on 2/2/18
In recent years there has been a growing concern about the gradually increasing average global temperatures. If this trend continues, would you expect the distributional range of some species to be affected?
Answer
2
Sandra Saju
Subject: Biology
, asked on 25/1/18
Represent the population growth in a habitat with limited resources and explain.
Answer
1
Sandra Saju
Subject: Biology
, asked on 25/1/18
How does the population density of Parthenium , fish and tiger census measured ?
Answer
1
Lalita Rani Singh
Subject: Biology
, asked on 20/1/18
Q 25 a and c
25.
(i) With the help of suitable examples, explain the following:
(a) Resource partitioning
(c) Light as a major ecologically relevant abiotic factor
Answer
1
Sandra Saju
Subject: Biology
, asked on 2/1/18
Compare the nutrient cycles of gaseous and sedimentary deposits. ( In tabular column 3 marks )
Answer
1
Sandra Saju
Subject: Biology
, asked on 2/1/18
When do you describe the relationship between two organisms as mutualistic, competitive and ammensalism ? Give one example of each type.
Answer
1
Apurva Inamdar
Subject: Biology
, asked on 18/12/17
Please explain the answer to question 11
Answer
2
B Ashwini
Subject: Biology
, asked on 19/11/17
Explain the defense mechanisms evolved in preys to avoid over population of their predators.
Answer
1
Gunjan Behwal
Subject: Biology
, asked on 4/11/17
Do you believe that an ideal parasite should be able to thrive within the host without harming it? Then why didn't natural selection lead to the evolution of such totally harmless parasites?
Answer
1
Ram
Subject: Biology
, asked on 30/9/17
Mention the four basic sources that fluctuate the density of population in a given habitat
Answer
1
1
2
3
4
5
Next
What are you looking for?
(A) antigen Y in both O and P
(B) antigen X in both O and P
(C) antigen X in O and Y in P
(D) antigen Y in O and X in P
explain meaning of (ii) point of mutualism.
(ii):- Mediterranean orchid Opbrys employs ' sexual decent' to get pollinated by a species of bee. One petal of its flower bears an uncanny resemblance to the female of the bee is size, colour and markings. The male bee is attracted to what it perceives as a female and 'pseudocopulates' with the flower. During this process, pollen are dizzed from the flower onto the male bee. When the same bee pseudocopulates with another flower, it transfer pollen to and thus pollinates the flower.
25. (i) With the help of suitable examples, explain the following:
(a) Resource partitioning
(c) Light as a major ecologically relevant abiotic factor