Tamil Nadu HSE Second Year Botany case studies
Tamil Nadu HSE Second Year Botany · Put your knowledge to work in context.
The Tamil Nadu Higher Secondary Certificate (HSE) Second Year Botany paper is the botany component of the Class 12 science stream under the Tamil Nadu State Board. It is taken by higher secondary students who have chosen the biology group and who intend to pursue degrees in botany, plant science, agriculture, biotechnology, environmental science or professional courses such as medicine and veterinary science. The Tamil Nadu HSE Second Year Botany case studies are 5 cases and about 4,615 words.
1Four Wet-Notebook Specimens from Kolli Hills
A team of four Second Year students spends two days surveying plants at Kolli Hills (about 1,100 m) for their practical record. On the last afternoon rain soaks the field notebook, and only these notes survive.
832 words, about 4 min2A Test-Cross That Refused to Give 1:1:1:1
In a brinjal ( Solanum melongena ) improvement programme at a Tamil Nadu agricultural college, two genes are being followed: P , purple fruit (dominant), p green fruit; S , spiny calyx (dominant), s spineless calyx. True-breeding purple spiny plants are crossed with true-breeding green spineless plants, and the F1 (PpSs) is test-crossed to a green spineless parent.
872 words, about 4 min3Bubble Counting on a Hydrilla Sprig
In a practical examination a candidate is given a fresh sprig of Hydrilla , a 250 mL beaker, 1% sodium bicarbonate solution, a 60 W lamp on a movable stand, a thermometer and a stopwatch. The lamp is placed 20 cm from the beaker and bubbles from the cut end are counted for one minute; the count is repeated after moving the lamp to 10 cm, 5 cm, 2 cm and 1 cm.
900 words, about 5 min4Chrysanthemums for a 15 May Show at 11°N
A floriculture unit near Coimbatore (11°N) has contracted to supply 2,000 potted chrysanthemums in full bloom for a flower show on 15 May. The variety grown is a qualitative short-day plant with a critical dark period of about 11 hours.
949 words, about 5 min5Milky Medium in Batch 47 and Off-Types at Subculture Six
A banana micropropagation unit produces 5,000 plantlets a month on MS medium with 3% sucrose and 0.8% agar at pH 5.8, autoclaved at 121 °C for 15 minutes in 500 mL bottles filled with 250 mL of medium at 15 psi. In batch 47, all 60 bottles from one autoclave load show a milky cloudiness in the medium within five days of inoculation, while the explants themselves look clean.
1,062 words, about 5 min