PRACTICE PAPER

The density of a population in a given habitat during a period, fluctuates due to changes in certain basic processes. On this basis, identify $\mathrm{A}$ and $\mathrm{B}$ boxes in the given flow chart.

In the given figure, identify the tropical forest and coniferous forest from the markings $\mathrm{A}-\mathrm{F}$ and select the correct option.

Examine the given figure and select the right option in which all the four structures $\mathrm{A}, \mathrm{B}, \mathrm{C}$ and $\mathrm{D}$ are labelled correctly.

Which of the following contraceptive methods correctly matches with its mode of action?

Which of the following is incorrectly matched?

Which is correctly labelled with respect to the given diagram?

Refer to the given schematic representation of menstrual cycle showing three phases I, II and III. Select the option that correctly matches these phases with the following events.

 (i) $FSH$ secreted by the anterior pituitary stimulates the ovarian follicle to secrete estrogen which stimulates the proliferation of the endometrium.

(ii) $LH$ secreted by the anterior pituitary stimulates the development of corpus luteum which secretes progesterone.

(iii) Reduced production of $LH$ from anterior pituitary causes degeneration of corpus luteum, thereby progesterone production is reduced.

Select the correct answer with respect to the given figures.