Which of the following are not causative agents of plant diseases?
Fungi
Viruses
Bacteria
Nematodes
Cercariae
Correct answer is E
No explanation has been provided for this answer.
The causative organism of sleeping sickness is a
Trypanosome
Plasmodium
Vibrio bacterium
penicillin
tsetse fly
Correct answer is A
African Trypanosomiasis, also known as “sleeping sickness”, is caused by microscopic parasites of the species Trypanosoma brucei.
It is transmitted by the tsetse fly (Glossina species), which is found only in sub-Saharan Africa.
Which of the following statements is not true of a climax vegetation? It
is an ecological phenomenon
is a stable community
eliminates competition
results from succession
involves the colonization of a habitat
Correct answer is C
No explanation has been provided for this answer.
thermoclines
homotherms
poikilotherms
eurytherms
stenotherms
Correct answer is B
No explanation has been provided for this answer.
Which of the following is not a characteristic feature of a tropical rain-forest habitat?
Trees with longer boles than those in Savannah
Fewer canopy strata than the savannah
Many more trees and climbers than savannah
Plenty leaves litter the ground
More diverse communities than the savannah
Correct answer is B
No explanation has been provided for this answer.