If a DNA strand has a base sequence TCA, its complementary strand must be
ATG
TAG
GAT
AGT
Correct answer is D
No explanation has been provided for this answer.
The pioneer organisms in ecological succession are usually the
mosses
lichens
ferns
algae
Correct answer is B
No explanation has been provided for this answer.
Soil fertility can best be conserved by the activities of
Earthworm
Man
Rodent
Microbes
Correct answer is D
No explanation has been provided for this answer.
A limited factor in a plant population near a chemical factory is likely to be
Light
Humidity
wind
pH
Correct answer is D
No explanation has been provided for this answer.
Mycorriza is an associationn between fungi and
protozoans
Roots of higher plants
Bacteria
Filamentous algae
Correct answer is B
No explanation has been provided for this answer.