Birds excrete nitrogenous wastes in form of
ammonia
sweat
urea
uric acid
urine
Correct answer is D
Nitrogenous wastes in the body tend to form toxic ammonia, which must be excreted. Mammals such as humans excrete urea, while birds, reptiles, and some terrestrial invertebrates produce uric acid as waste.
The process which reduces the nitrogen content of the soil is
ammonification
denitrification
nitrogen fixation
nitrification
putrefaction
Correct answer is B
No explanation has been provided for this answer.
Dry, horny scales in reptiles help them to
carryout gaseous exchange
escape from predator
facilitate movement
look for mating partners
prevent water loss.
Correct answer is E
No explanation has been provided for this answer.
Which of these statements best defines pyramid of energy?
energy flow from one tropic level to another
energy flow from one habitat to another
the amount of energy in a given area
the loss of energy from one organism to another
the rate of energy flow in an area
Correct answer is A
No explanation has been provided for this answer.
Autotrophs include all the following EXCEPT
chemosynthetic bacteria
diatoms
green plants
phytoplankton
zooplankton
Correct answer is E
No explanation has been provided for this answer.