Pollen grains in pinus have __________ for dispersal through wind?
Pollen grains in us have __________ for dispersal through wind?
A. Flagella
B. Cilia
C. Wings
D. Feathers
Pollen grains in us have __________ for dispersal through wind?
A. Flagella
B. Cilia
C. Wings
D. Feathers
Oxygen accounts for __________ percent of totals human body mass?
A. 65%
B. 18%
C. 10%
D. 3%
_____________________ contains the green chemical called chlorophyll.
A. Cytoplasm
B. Cell membrane
C. Chloroplasts
D. Vacuole
Which of the following substance is most favorable to form structural component of biological membranes___________?
A. Hydrophilic Carbohydrates
B. Hydrophobic fats.
C. Both a and b
D. None of these
Which one is a micromolecule__________?
A. Polysaccharide
B. Protein
C. Hemoglobin
D. ATP
Secondary cell wall of sclerenchyma cells is impregnated with_________________?
A. Cellulose.
B. Peptidoglycan and murein.
C. Lignin.
D. Pectin.
The air spaces may comprise upto _________ of total volume of leaf surface?
A. 30%
B. 20%
C. 40%
D. 50%