Study the following statements:
1. Lungs are enclosed in double membrane called Pleura.
2. Between the two layers in the pleural cavity filled with pleural fluid.
3. In humans, left lung has two lobes, while right lung has three lobes.
4. In rabbit, right lung has two lobes.
Which of the statements given above are correct about lungs?
Important Questions on Biology
The main thinking part of the brain is
Consider the following statements
1. End product of anaerobic respiration is lactic acid.
2. Asthma is caused due to spasm in bronchial muscles.
3. Mammalian lung have numerous alveoli for increasing surface area for gaseous diffusion.
4. At the time of inspiration, the diaphargm is contract.
Which of the statements given above are correct?
1. It is warm
2. It is filtered
3. Some oxygen is extracted from it
4. Some carbon dioxide is added to it
The human eye is like a camera and, hence, it contains a system of lens. The eye lens forms,
Which of the following statements about sexual reproduction in flowering plants are correct?
Stamen is present in the centre of a flower.
Stamen produces pollen grains.
The swollen bottom part of carpel is the ovary.
The fusion of germ cells gives rise to zygote.
Select the correct answer using the codes given below
