Given below are sets of five terms each. Rewrite the terms in correct order in a logical sequence beginning with the first word that is underlined:

(i) Stimulus, Response, Receptor, Effector, Spinal cord.

(ii) Root hair, Endodermis, Epidermis, Xylem, Cortex.

(iii) Conjunctiva, Yellow spot, Pupil, Vitreous Humour, Aqueous Humour.

(iv) Australopithecus, Cro-Magnon Man, Homo erectus, Neanderthal Man, Homo sapiens.

(v) Artery, Capillaries, Venule, Vein, Arteriole

The fusion of the sperm and ovum is termed as:

1. Reproduction
2. Development
3. Fertilization
4. Embryo

Which of the following is not a natural reflex action?

1. Knee-jerk
2. Blinking of eyes due to strong light
3. Salivation at the sight of food
4. Sneezing when any irritant enters the nose

The structural and functional units of excretion in the human kidney is the:

1. Ureter
2. Bowman’s capsule
3. Renal pelvis
4. Nephron