CIE Biology Paper-1: Specimen Questions 12 - 14 of 109
Question number: 12
Which diagram shows a cell from the liver?
Liver cell has nucleus, rough endoplasmic reticulum and free ribosome.
Question number: 13
Which theory explains the process of water flow upwards through the xylem of plants?
Darwin’s theory of evolution
Theory of plant morphology
Cohesion tension theory was proposed in 1894 by Dixon and Joly.
Main process includes: Cohesion of water.
Adhesion between water and xylem tissues.
Question number: 14
Xylem consists of?
|d.||All a. , b. and c. are correct|
Parenchyma is one of the three main types of ground tissue, it has distinguished thin cell wall.
Tracheids are elongated cells in the xylem of vascular plants that serve in the transport of water and mineral salts.
The fibers of the xylem are always lignified.