CSEC Biology case studies
CSEC Biology · Put your knowledge to work in context.
The Caribbean Secondary Education Certificate (CSEC) is a regional certification offered by the Caribbean Examinations Council (CXC®). CSEC subjects are examined for certification at the General and Technical Proficiencies, and the qualification provides students with the foundation for further studies and entry to the workplace. The CSEC Biology case studies are 5 cases and about 3,876 words.
1Wilting Tomatoes on a Brackish Well
Mrs Charles grows tomatoes on 2 hectares of coastal land in southern Jamaica. For three seasons she has irrigated from a well that is becoming brackish.
788 words, about 4 min2Amylase, Temperature and a Confident Conclusion
Devon and Akeil investigate the effect of temperature on the breakdown of starch by amylase. For each temperature they put 5 cm³ of 1% starch solution in one test tube and 1 cm³ of amylase solution in another, stand both in a water bath for five minutes, then pour the enzyme into the starch and start a stopwatch.
715 words, about 4 min3Two Carriers, One Affected Child: Explaining Risk to a Family
At a community clinic in Trinidad, 500 adults are screened for haemoglobin genotype: 380 are AA, 100 are AS (carriers) and 20 are SS (affected). In the same clinic, a couple, both AS, have one child with sickle cell anaemia and a second child who is AA.
759 words, about 4 min4Limpets, Reserves and a Confounded Comparison
Two sixth-form students compare limpets on a rocky shore inside a marine reserve and on a public beach 8 km away. At each site they run one 30 m tape from the high-water mark to the low-water mark and place a 0.25 m² quadrat every 3 m, counting every limpet in each quadrat.
807 words, about 4 min5Six Litres of Urine a Day: Is It Sugar Diabetes?
Marcus, 14, is brought to a health centre. Over the past month he has been drinking constantly and passing up to 6 litres of urine a day, waking four or five times a night; he has lost 3 kg although his appetite is good.
807 words, about 4 min