Two pink flowered snapdragon plants(Rr) are self-pollinated. The probability of the off springs to have white flowers are
25%
50%
75%
2.5%
2.5%
A.
25%
When two pink flowered snapdragon plants are self pollinated, the probability of the offsprings having white flower can be demonstrated by the following-
Therefore, 25% offsprings can have white flowers.
Evolution of different species in a given geographical area, starting from a point and spreading to other geographical areas is known as
Geographic isolation
Migration
Parallel evolution
Natural selection
Natural selection
Which of these are examples of evolution by anthropogenic action?
(i) Adaptive radiation of marsupials of Australia.
(ii) Appearance of antibiotic resistant microbes.
(iii) Evolution in finches Galapagos island.
(iv) Appearance of dark winged moth in England during post industrialization period.
(v) Convergent evolution of placental mammals in Australia.
(i) and (iii) only
(v) only
(ii) only
(ii) and (iv) only
(ii) and (iv) only
In a polynucleotide chain of a DNA molecule, the two nucleotides are linked through
hydrogen bonds
5' – 3' phosphoester linkage
3' – 5' phosphodiester linkage
N-glycosidic linkage
N-glycosidic linkage
Short-lived immunity acquired from mother to foetus across the placenta or through mother's milk to the infant is categorized as
Active immunity
Passive immunity
CMI
Autoimmunity
Autoimmunity
In a population, a gene has two alleles 'A' and 'a'. The frequency of allele 'A' is 0.4. What will be the frequency of allele 'a'?
0.4
0.6
0.48
0.16
0.16
Which of the following microbes is used for the commercial production of ethanol?
Clostridium butylicum
Trichoderma polysporum
Monascus purpureus
Saccharomyces cerevisiae
Saccharomyces cerevisiae
Which one of the following is not in situ conservation method?
National parks
Wildlife sanctuary
Biosphere reserves
Scared groves
Scared groves
Morphine, used as an analgesic is obtained from
Erythoxylum coca
Atropa belladonna
Papaver somniferum
Cannabis sativa
Cannabis sativa
| Column I | Column II |
| i. Statins | A. Propionibacterium shermanii |
| ii. Swiss cheese | B. Streptococcus |
| iii. Cyclosporin A | C. Aspergillus niger |
| iv. Citric Acid | D. Trichoderma polysporum |
| v. Clot buster | E. Monaseus purpureus |
i - E; ii - A; iii - D; iv - C; v - B
i - B; ii - A; iii - D; iv - D; v - C
i - C; ii - A; iii - B; iv - C; v - D
i - C; ii - E; iii - A; iv - D; v - B
i - C; ii - E; iii - A; iv - D; v - B
