Addition of salts and other solutes from other cells into xylem sap, __________ the water potential of the xylem sap
(A) Increases.
(B) Lowers.
(C) Doesn’t effect.
(D) Maintains.
Symbionts which help plants in uptake of phosphorous and trace metals such as zinc and copper.
(A) Bacteria
(B) Viruses
(C) Fungi
(D) Cyanobacteria
Low level of CO2 favours _________ of the stomata.
(A) Opening
(B) Closure
(C) Both of these
(D) None of these
There are _________ hypothesis which may explain opening and closing of stomata?
(A) One
(B) Two
(C) Three
(D) Four
The opening and closing of stomata is directly controlled by the___________?
(A) Temperature
(B) pH
(C) Light
(D) None of these
Pressure flow theory was proposed by_________?
(A) H-Van Mohl
(B) Dixon
(C) Vander wall.
(D) Earnst Munch
Open circulatory system can contain_________?
(A) Red Blood Cells
(B) White Blood Cells
(C) Haemoglobin
(D) All of these
95% of the cytoplasm of red blood cells is the___________?
(A) Antibodies
(B) Hemoglobin
(C) Enzymes
(D) Proteins
_________ give rise to macrophages, which destroy larger particles by phagocytosis.
(A) Nautrophils
(B) Basophila
(C) Monocyte
(D) Lymphocyte