Which of the following is/are the main organ/s of human respiratory system?

Human nose has two holes in it which are called

Which of the following parts of respiratory tract has the C-shaped cartilaginous rings for support?

The part of throat between the mouth and the windpipe is called

Trachea is supported by rings of soft structures called

The upper end of trachea has a voice box called

The trachea is a tube which is also called

The trachea runs down the neck and divides into two smaller tubes, which are called

The lungs are covered by two thin membranes called

The lungs are separated from the abdominal cavity by a muscular partition called

The lungs are enclosed in a cage made of bones called

The outer layer of cells in the roots of plants is called

Bronchus divides in the lungs to form a large number of smaller tubes called

The pouch-like air sacs at the ends of the smallest bronchioles are called

The walls of alveoli are surrounded by

The layer of cells around the vascular tissues (xylem and phloem) in the roots of plants is called

Which of the following cells do not have nuclei?

Which of the following is a machine provided to facilitate breathing?

Which of the following cells have nucleolus?

Which of the following blood cells make chemicals known as antibodies to fight against infection?

Which of the following is/are not single-celled animal/s?

The normal range of haemoglobin in the blood of a healthy adult person is

Which of the following structures carries water and minerals in the plants?

The plant tissue existing between the epidermis and the vascular bundle is

The part of the vascular bundle used to transport minerals and water from the roots to upper parts of plants is called