31. Fishes survive under the frozen lake, because
32. The yeast cells secrete enzymes on the substratum which are collectively called the
33. Assertion (A): Amoeba reproduces by fission.
Reason (R): All unicellular organisms reproduce by asexual methods.
Reason (R): All unicellular organisms reproduce by asexual methods.
34. Which of the following divisions of plants does not have a well differentiated body?
35. A group of archae bacteria is used in the production of
36. Who among the following for the first time made recognition of existence of latex, bulbs, ovary and also correlative position of other floral parts, fruits and seeds?
37. The drug obtained from the bark of cinchona was used for treating malaria. The synthetic drug which replaced the natural product is
38. Which is not insect amongst following?
39. In which of the following types of root apices in dicots, there are two layers of initials at the tip, one forming the central cylinder and the other forming the cortex and root cap?
40. The euglenoids differ from the green algae in that the reserve food is
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