Disease - Schistosomiasis

-


Comments

Post a Comment

Popular posts from this blog

Developed Countries

-
Image
1. Population Pyramid of Singapore Age structure:  0-14 years: 12.80 % (male 391,714 / female 373,766) 15-24 years:  16.00% (male 473,012 / female 489,553) 25-34 years:  21.30% (male 614,644 / female 664,018) 35-44 years: 16.40% (male 478470 / female 505,592) 45-54 years:  12.90% (male 383,414 / female 388,569) 55-64 years:  10.5% (male 316,001 / female 315,648) 65 years and above:  9.90% (male 274,863 / female 326,727)     B ased on the latest United Nations estimation , t he current population of  Singapore   is   5,763,968.  The population density in Singapore is 8274 per km 2   (21,430 people per mi 2 ) while t he total   land   area is 700  km 2  (270 sq. miles).  The   median age   in Singapore is   40.5 years .           As we can see the Singapore population pyramid has a contracting type.  The gr...
Read more

Keystone Species

-
Image
       Keystone Species          A keystone species is a plant or animal that plays a unique and crucial role in the way an ecosystem function. Without keystone species, the ecosystem would be dramatically different or cease to exist altogether. All species in an ecosystem, or habitat, rely on each other. The contributions of a keystone species are large compared to the species' prevalence in the habitat. Nevertheless, a small number of keystone species can have a huge impact on the environment. A keystone species is often, but not always, a predator. Just a few predators can control the distribution and population of large numbers of prey species. 1. HONEY BEES              Honey bees are keystone species in their environment. We all know that honey bees are involved in the process of pollination which is one of the primary ways plants reproduce. Honey bees are responsible for the...
Read more