Energy Metabolism: After the absorption and transportation of amino acids, sugars and fatty acids, the oxidation takes place, which yields virtually all the chemical energy required by animals. The use of this chemical energy by the ...See more Answered
Mediated Transport: The actual absorption of the digested food depends on the transport processes across membranes. Diffusion is one of several transport phenomena that occur in nature. It is a type of passive transport, therefore, i...See more Answered
Gastrointestinal Hormones: The three important mammalian gastrointestinal hormones are secretin, gastrin and cholecystokinin (CCK) and their physiology is mentioned in the following table:
[img alt_text=' Gastrointestinal Hormones...See more Answered
Mendel's classical experiments with pea: Mendel was the first scientist to examine in a quantitative manner, the behaviour if traits between generations by selecting a well suited study material.
Many scientists failed before Mend...See more Answered
Homozygous and Heterozygous: An individual that carries two identical alleles for a locus is said to be homozygous for that locus. if the two alleles are different, then the individual is said to be heterozygous (e.g. Aa).
The gen...See more Answered
Gene: Mendel proposed the concept of hereditary units, which were later on identified as genes. A gene is a molecular unit of heredity of a living organism found in chromosomes. Different traits such as colour of the flower, seed sha...See more Answered
Estuary is a transitional zone between rivers and sea representing the ecotone possessing unique ecological features and biotic communities.
The salinity gradient exist although in an estuary but pattern of gradient varies seasonally, wi...See more Answered
Overturn: Circulation of lake water occurs twice a year, in the spring and in autumn through a process called overturn. Importance: Through this circulation of lake water. thorough mixing of oxygen, phytoplanktons an...See more Answered
The marine ecosystem is very different from fresh water ecosystem. It covers almost seventy percent of the earth's surface. The silent features of marine ecosystem are:
Salinity: The salinity of sea is f...See more Answered
There are different life zones exhibited by the lakes. The lakes can be divided into vertical and horizontal zonations. The definite zones which are present in lakes are:
Open water zones, andSee more Answered
Like any other ecosystem, the aquatic ecosystem also have certain limiting factors which influence the productivity of aquatic ecosystem. These factors are 'sunlight' which controls the photosynthetic activities. Transparency is an i...See more Answered
Digestive Tract: The development of extracellular digestion had enabled animals to ingest a few large chunks of food otherwise they had to feed on small particles. Extracellular digestion takes place in a tubular cavity of the digest...See more Answered
Protein Digestion: Protein digestive enzymes are divided into two groups i.e. endopeptidases and exopeptidases. Endopeptidases act in the interior of the protein molecule for breaking the large peptide chain into smaller fragments. T...See more Answered
Carbohydrate Digestion: Monosaccharides such as glucose can be absorbed and metabolised directly but disaccharides such as sucrose or lactose and polysaccharides such as starch and glycogen have to be broken down to simpler monosacch...See more Answered
Digestion is the process by which the food is broken down into simpler molecules to obtain energy with the help of enzymes. Digestion may be intracellular i.e. when it take place inside the cell or may be extracellular i.e. when it takes place outsid...See more Answered