Question

Q1)Difference between:-

a) Male urethera and Female urethera

b) Photosynthesis and Respiration

Q2). Why it is necessary for complete separation of oxygenated and deoxygenated blood in Mammals and Birds?

Answer 1

Q1)Male and female urethra.
•In the male urethra it opens at the tip of the penis. Epididymes, vasa deferentia and urethra transport spermicide towards penile meatus or passage. They are collectively called excretory genital ducts.
•In the female urethra it arises from the urinary bladder and is about 20 cm long. Urinary part carries only urine.

Q2)Photosynthesis and respiration:
• Photosynthesis takes place in the presence of sunlight only whereas, •Respiration continues throughout day and night, in sun and darkness
•Photosynthesis absorbs light and is a endothermic reaction
•Respiration gives out energy and is, therefore, exergonic.
•Photosynthesis utilises carbon dioxide and water
•Respiration evolves carbon dioxide and water.

Q3)Separation of the blood
It is done in order to avoid the mixing of preferential nutrients, wastes and important enrich elements assigned to all the vessels. If at all there is no separation there will be no energy displacement correctly configured and the organism dies.