biology for grade 7

Vertebral column is also called back bone or spine and encloses the spinal cord. It is a flexible,curved , vertical rod, and consists of a row of 33 movably articulated ring like bones called vertebrae . Between each of the two bones the space is supplemented by pads of fibro-cartilage called the i..

The Vertebral Column Or Spinal Column - Vertebral column is also called back bone or spine and encloses the spinal cord. It is a flexible,curved , vertical rod, and consists of a row of 33 movably articulated ring like bones called vertebrae . Between each of the two bones the space is supplemented..

1. Take 2 ml of ash solution. 2. Add 2-3 drops of 7% barium chloride. White precipitate appears. 3. Shake and add 4 drops of 25% acetic ac..

It is a red coloured, viscous, alkaline (pH about 7.4) fluid flowing through the body of higher animals. The adult human body consists of 5-6 litres of bloo..

It is present at the bend of the duodenum. It secretes pancreatic juice which has an almost neutral pH (6 to 7). This juice is secreted into the common bile duct and then into the duodenum. About 700cc of pancreatic juice is secreted everyda..

16 Forest types are recognised in India. The bulk of our forests is made up of Tropical dry deciduous - 38.7% Tropical moist deciduous - 30.9% Tropical thorn - 6.9% Sal and Teak plantation - ..

It is absorbed in the form of borate ions (BO 3 3 - or B 4 O 7 2 -..

It is a solid, double nerve cord that passes along below the alimentary canal till the end of the body. It has nine ganglia along its length. The first three are the thoracic ganglia and the next six are the abdominal ganglia . The thoracic ganglia are big and situated one in each thoracic se..

It is a red coloured, viscous, alkaline (pH about 7.4) fluid flowing through the body of higher animals. The adult human body consists of 5-6 litres of blood. It has two components: Fluid plasma Solid formed elements The elements include corpuscles and platelet..

fig. 7.4 - Examples of Binomial Nomenclatu..