Sugarcane show high efficiency of CO2 fixation because of :
Calvin cycle
Hatch and Slack cycle
TCA cycle
greater sunlight
B.
Hatch and Slack cycle
Sugarcane is a C4 plant. It fixes carbon dioxide by Hatch and Slack cycle. They do not show photorespiration, although, they are better photosynthesizers than C3 plants. C4 plants show better efficiency of CO2 fixation due to Hatch and Slack cycle. Also, C4 plants are better adapted to hot and arid climate than C3 plants.
The plant ash is an indication of :
organic matter of plant
waste product
mineral salts absorbed by plants
none of these
Which of the following fungi is found useful in the biological control of plant disease ?
Penicillium notatum
Phytophthora parasitica
Mucor mucido
Trichoderma viridae
Which of the following plant yields oil and fibre both ?
Cocos nucifera
Eucalyptus
Brassica campestris
Euphorbia hirta
Capitulum inflorescence is found in :
Compositae (Asteraceae)
Cruciferae (Brassicaceae)
Solanaceae
Malvaceae
Which of the following organs is not involved in the elicitation of immune response?
Brain
Lymph nodes
Spleen
Thymus
Fever in malaria is due to :
entry of sporozoites into blood capillaries
entry of merozoites into liver cells
release of merozoites from red blood cells
entry of cryptomerozoites into red blood cells
The origin of kidney and ureter in Rana tigrina is :
all mesodermal
all endodermal
ectodermal and mesodermal
mesodermal and endodermal
Which of the following is not a case of epimorphosis ?
Formation of sperms from small clumps of cells
Regeneration of tail in a lizard
Replacement of severed arm in starfish
Replacement of limb in salamander