Biology
Main reason for sharp rise in world human population in the recent past
- Poor health care
- Improved nutrition
- More deaths
- Small scale immunisation
Related Questions
The accidental discharges of petroleum in oceans or estuaries are
- industrial waste
- oil spills
- oil waste
- liquid spills
Assertion (A) An average adult have about 5-6 litres of blood by volume in his body.
Reason (R) The main functions of the blood in our body are transportation and protection.
- Both A and R are true
- Both A and R are false
- A is true and R is false
- A is false and R is true
In human females, 23rd pair of chromosome is
- XY
- XX
- Both XX and XY
- Neither XX or XY
Which of the following blood vessels is comprised of thick walls and narrow central lumen?
- Vein
- Venule
- Artery
- Capillary