Q. 36. The pyramid of biomass in sea is generally inverted because:
(A) sunlight is filtered through sea water leading to less photosynthesis
(B) of the high salt content of sea water
(C) the biomass of phytoplankton far exceeds that of fishes
(D) the biomass of fishes far exceeds that of phytoplankton
Answer:
Explanation:
Q. 37. One of the following is NOT a characteristic/ criteria of genetic materials, identify it:
(A) Genetic material should be able to generate its replica
(B) Genetic material should be stable chemically and structurally
(C) It should not provide the scope for mutations.
(D) It should be able to express itself in the forum of mendelian characters.
Answer:
Explanation:
Q. 38. Adenine pairs with Thymine through how many hydrogens bonds?
(A) 2
(B) 3
(C) 4
(D) 5
Answer:
Explanation:
Q. 39. A pure breeding garden pea plant was crossed with a pure dwarf plant. The plant produced 400 seeds. The seeds were sown to produce plants. The phenotype of the plants in next generation will be –
(A) All tall
(B) All dwarf
(C) 300 tall and 100 dwarf plants
(D) All plants of intermediate height
Answer:
Explanation:
Q. 40. If in a pond there were 150 carps found last year and through reproduction 450 new carps are added in the pond, what will be the birth rate here?
(A) 4 offsprings per carp per year
(B) 3 offsprings per carp per year
(C) 2 offsprings per carp per year
(D) 1 offspring per carp per year
Answer:
Explanation: