More than ___________ compounds of tar of tobacco smoke are involved to cause cancer??
A. 5
B. 90
C. 15
D. 10
Category: Biology Mcqs
All the animals of the grade radiata are____________??
A. Diploblastic
B. Triploblastic
C. Both
D. Unicellular
In alcoholic fermentation Pyruvic acid is broken down into??
A. Acetaldehyde
B. Methyl alcohol
C. Ethyl alcohol
D. Lactic acid
The movement of water molecules from a region of higher water potential to a region of lower water potential (through membrane)?
A. Deffusion
B. Osmosis
C. Active transport
D. None of these
Crop rotation helps in______________??
A. Growth of pathogens
B. Soil Infertility
C. Slowing of crops growth
D. Eradication of disease
Roots of a plant show______________??
A. Positive phototropism and negative geotropism
B. Negative phototropism and positive geotropism
C. Negative tactic movement and positive tropic movement
D. Positive geotropism of stem and roots
Arterial blood contains _________ of CO2 per 100 ml of blood?
A. 54 ml
B. 60 ml
C. 64 ml
D. 50 ml
The cell wall of oomycetes is chiefly composed of___________??
A. Chitin
B. Cellulose
C. Lignin
D. Proteins
Which of the following tracheophytes are also called arthrophytes______________??
A. Psilopsids
B. Lycopsids
C. Sphenopsids
D. Prteropsids
Megaphylls are characteristic for____________??
A. Ferns
B. Seed plants
C. Both of these
D. None of these
