Sapwood is formed from_____________?
(A) Primary xylem
(B) Secondary xylem
(C) Primary phloem
(D) Secondary phloem
Autophagosomes are____________?
(A) Those lysosomes which eat parts of their own cells to generate energy.
(B) Those lysosomes which eat old and worn out cellular organelles.
(C) Lysosomes which help in extracellular digestion
(D) Both a and b
Humming bird is an example of________________?
(A) Cold blooded animal
(B) Ectotherm
(C) Endotherm
(D) Heterotherm
Cellulose is the major component of__________?
(A) Primary wall
(B) Secondary wall
(C) Middle lamella
(D) all of the above
Conversion of ammonia or ammonium ion into nitrites during nitrogen cycle occurs due_____________?
(A) Rhizobium
(B) Nitrosomonas
(C) Nitrobacter
(D) Pseudomonas
Annual rainfall in grassland is about_____________?
(A) More than 2500 mm
(B) 750-1500 mm
(C) 250-750 mm
(D) Less than 250 mm
The first layer of cell wall which is formed is___________?
(A) Primary wall
(B) Secondary wall
(C) Middle lamella
(D) All of these
The productivity of aquatic ecosystem is basically determined by light and____________?
(A) CO2
(B) O2
(C) Water
(D) Nutrients