biology-today_2015-03
1.^ The given graph shows the concentration of urine produced in three different mammals, A, B and C. Three types of kidney tubu ...
3. One way to express some aspects of the age distribution characteristics of a population is through a survivorship curve. The ...
There are several species of North American hares. The given figure shows the correlation between 4. external ear size in differ ...
sOLuTIOns (i) Mammals are capable of forming urine, that is more concentrated than blood plasma, thus maximising the amount of ...
the measurement of small quantities of antigen. (i) Heat loss or gain is directly related to exposed surface area. Shorter extr ...
UnIT-VII : GEnETICS AnD EVOLUTIOn ChApTEr-5 : prInCIpLES OF InhErITAnCE AnD VArIATIOn Multiple Choice Questions If both parents ...
Which of the following genotypes of man shows presence of one Barr body? (a) XY (b) XXXY (c) XXY (d) All of these Which of the ...
Match The Columns Match Column-I with Column-II. Column-I Column-II A. Male heterogamety (i) 13-Trisomy B. Patau’s syndrome (ii ...
Assertion : Grasshopper is an example of XY type of sex determination, similar to Drosophila. Reason : Males have X and Y chro ...
(c) UTRs are present between the start codon and stop codon. (d) At the end of translation, the release factor binds to the init ...
DNA is a polymer of nucleotides which are linked to each other by 3’-5’phosphodiester bond. To prevent polymerisation of nucleo ...
Assertion & reason In each of the following questions, a statement of Assertion (A) is given and a corresponding statement o ...
ChApTEr-7 : EVOLUTIOn Multiple Choice Questions In a population of 1000 individuals, 360 belong to genotype AA, 480 to Aa and t ...
The prebiotic atmosphere of the earth was of a reducing nature. It was transformed into an oxidising atmosphere of present day ...
Match The Columns Match Column-I with Column-II. Column-I Column-II A. Discontinuous (i) Darwin’s finches distribution B. Raym ...
to the first bony fishes, placoderms and cartilaginous fishes. Assertion : Cro-Magnon is believed to be more intelligent and c ...
(c) 30. (c) 31. (d) 32. (c) 33. (a) (c) 35. (d) 36. (a) 37. (c) 38. (b) (i) It is a dominant allele. Also, one parent (fat ...
• a sensory system is a part of nervous system responsible for processing sensory information. It enables us to detect change ...
Working of SenSory receptorS • a stimulus is some form of energy : light, sound, pressure, heat, osmotic potential, electric ...
taSte receptorS (guStatoreceptorS) • The receptors for taste are found in about 10,000 taste buds, mostly located on the tong ...
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