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
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Oxygen accounts for __________ percent of totals human body mass?
Oxygen accounts for __________ percent of totals human body mass?
A. 65%
B. 18%
C. 10%
D. 3%_____________________ contains the green chemical called chlorophyll.
_____________________ contains the green chemical called chlorophyll.
A. Cytoplasm
B. Cell membrane
C. Chloroplasts
D. VacuoleWhich of the following substance is most favorable to form structural component of biological membranes___________?
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 theseWhich one is a micromolecule__________?
Which one is a micromolecule__________?
A. Polysaccharide
B. Protein
C. Hemoglobin
D. ATPSecondary cell wall of sclerenchyma cells is impregnated with_________________?
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?
The air spaces may comprise upto _________ of total volume of leaf surface?
A. 30%
B. 20%
C. 40%
D. 50%