In connection with the working of a microphone , a few statements are given in boxes. Arrange them in the proper sequence.

Steps of the genetic engineering process through which new gene become the part of genetic constitution of target cell are given in disorder form. Write them in correct sequence.

The diagram given below shows the transverse section of a young anther. Identify the parts a,b,c and d. (b) The developmental stages of male gametes in plants consist of microsporogenesis and male gametophyte. Arrange the following terms in their correct development sequence. Pollen grain Sporogenous tissue Anther Microspore tetrad Pollen mother cell Male gamete

Given below are the stages in the generation of optic nerve impulse or action potential on the retina and the role of opsin and retinal in the mechanism of vision. Arrange them in a sequential order. a) Action potential (impulses) are transmitted by the optic nerves to the visual cortex area of the brain. b) Light induces dissociation of retinal from opsin. c) Generates action potential in the ganglion cells through bipolar cells. d) Structural changes in the opsin which induce membrane permeability changes. e) Potential differences are generated in the photoreceptor cells. f) Neural impulses are analyzed by visual cortex area of the brain.

Given below are the steps in the working of a flouroscent lamp. Arrange them in the proper order. Ultraviolet rays are produced , Visible light is emitted , Fastly moving electrons collide with the unionized molecules of mercury, Due to electric current thorium oxide coated heating element becomes red hot .

A list of different organisms in an ecosystem are given below. Arrange them in 1st, 2nd, 3rd, and 4th trophic level. A - Phytoplankton B - man C - fish D - Zooplankton