There are _________ stomata per square cm of leaf surface in Tobacco plants??
A. 1200
B. 12000
C. 100,000
D. 1000
Category: Biology Mcqs
Which chemical component has the greatest contribution in the total mammalian cell weight__________??
A. Proteins
B. Carbohydrate
C. Lipids
D. Water
Pollen grains in pinus have __________ for dispersal through wind??
A. Flagella
B. Cilia
C. Wings
D. Feathers
Transport of minerals from soil to epidermal cells of roots via carrier protein molcules along their concentration gradient is called___________??
A. Diffusion.
B. Facilitated diffusion.
C. Passive transport.
D. Active transport.
Sebum produced from sebaceous glands in a mammal helps in___________??
A. Protection against micro organisms
B. Temperature regulation
C. Excretion
D. All of these
The experiments on DNA molecules in chromosomes for knowing the basis of inherited diseases are conducted by ??
A. Molecular biologists
B. Microbiologists
C. Freshwater biologists
D. Social biologist
Capillaries are the example of_________??
A. Organ System
B. Cell
C. Organ
D. Tissue
Annual rainfall in grassland is about_____________??
A. More than 2500 mm
B. 750-1500 mm
C. 250-750 mm
D. Less than 250 mm
____________% of Glucose normally present in our blood is??
A. 0.80%
B. 0.08%
C. 1.80%
D. 8%
Diatoms are found in__________??
A. Phytoplanktonic population
B. Freshwater lakes and ponds
C. Marine environment
D. All of the above
