(a) All mammals (except a few) have seven cervical vertebra.
(b) The number of phalanges in each limb of a human is 14.
(c) Thin filament of myofibril contains 2 ‘F’ actins and two other proteins, namely troponin and tropomyosin.
(d) In a muscle fibre, Ca++ is stored in the sarcoplasmic reticulum.
(e)11th And 12th pairs of ribs are called floating ribs.
(f) The human cranium is made up of eight bones.
Define a taxon. Give some examples of taxa at different hierarchical levels.
What are the steps involved in formation of a root nodule?
Describe the digestive role of chymotrypsin. What two other digestive enzymes of the same category are secreted by its source gland?
Distinguish between
(a) IRV and ERV
(b) Inspiratory capacity and Expiratory capacity
(c) Vital capacity and Total lung capacity