State the main function of the following:

(i) Cerebrospinal fluid

(ii) Eustachian tube

(iii) Suspensory ligament of the eye

(iv) Sperm duct

(v) Lenticels

Given below are six sets with four terms each. In each set one term is odd and cannot be grouped in the same category to which the other three belong. Identify the odd one in each set and name the category to which the remaining three belong. The first one has been done as an example. Example: Calyx, Corolla, Stamens, Midrib
Odd term: midrib
Category: Parts of a flower

(i) Haemoglobin, Glucagon, Iodopsin, Rhodopsin

(ii) Urethra, Uterus, Urinary bladder, Ureter

(iii) Transpiration, Photosynthesis, Phagocytosis, Guttation

(iv) Cyton, Photon, Axon, Dendron

(v) Oxytocin, Insulin, Prolactin, Progesterone

The figure given below represents an experimental setup with a weighing machine to demonstrate a particular process in plants. The experimental setup was placed in bright sunlight. Study the diagram and answer the following questions:

(i) Name the process intended for study.

(ii) Define the above mentioned process.

(iii) When the weight of the test tube (A & B) is taken before and after the experiment, what is observed? Give reasons to justify your observation in A & B.

(iv) What is the purpose of keeping the test tube B in the experimental setup?

Copy and complete the following by filling in the blanks 1 to 5 with appropriate words:

The human female gonads are ovaries. A maturing egg in the ovary is present in a sac of cells called …………… (1). As the egg grows larger, the follicle enlarges and gets filled with a fluid and is now called the …………… (2) follicle. The process of releasing the egg from the ovary is called …………… (3). The ovum is picked up by the oviducal funnel and fertilisation takes place in the …………… (4). In about a week, the blastocyst gets fixed in the endometrium of the uterus and this process is called …………… (5).