1. a) Define the following:
(i) Anatomical dead space
(ii) Cardiac output
(iii) Resting potential in a neuron cell
(iv)Parthenogenesis
(v) Pheromones
b) What do you understand by blood pressure? Explain the process of fluid transfer between the capillaries and tissue.
2. a) What does an oxygen dissociation curve show? Draw and compare the oxygen dissociation curves of haemoglobin and myoglobin.
b) Why do animals exhibit differences between their essential food requirements? Where does the absorption of carbohydrates, lipids and amino acids take place in the vertebrate body? Describe the method of glucose absorption.
3. a) Discuss the nature and functions of estrogens in mammals.
b) With the help of a diagram, discuss the formation and secretion of amino acid based hormones.
4. a) List the three basic functions of the vertebrate kidney. Describe the adaptations in terrestrial animals to cope with water loss.
b) Explain synaptic transmission at the neuromuscular junction with the help of a suitable diagram.
c) Discuss how calcium ions act as physiological regulators of muscle contraction.
5. Write short notes on the following:
(i) Regulation of kidney function.
(ii) Factors responsible for deaths due to heat
(iii) Modes of respiration in animals
(iv)Effect of gastric hormones
6. (a) Define the following:
(i) Osmosis
(ii) Field Capacity
(iii) Morphogenesis
(iv) Vernalisation
(v) Overall Senescence
(b) Describe how active transport takes place across the plasma membrane in plants.
7 (a) Define stomatal frequency and stomatal index. Describe the main functions performed by stomata.
(b) Make a chart of all macronutrients and micronutrients needed for plants and give one function of each nutrient.
8. (a) Discuss why photorespiration is called “necessary evil”.
(b) Describe electron transport pathway through photosystem I and photosystem II with suitable diagram.
9. (a) Make a comparative chart of the function of all the plant hormones.
(b) Describe practical applications of plant hormones.
10. Write notes on the following:
(i) Red Drop
(ii) Biological responses controlled by Phytochrome
(iii) Biological clocks
(iv) Fensom and Spanner electroosmotic Flow Hypothesis
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