What percentage of oxygen is contained in exhaled air?
21%
16%
4%
0.04%
Less than 0.01%
Correct answer is B
No explanation has been provided for this answer.
The instrument used to measure the rate of transpiration in plants is called a/an
Anemometer
Barometer
Hydrometer
Photomer
Potometer
Correct answer is E
No explanation has been provided for this answer.
What is NOT an abiotic factor?
Humidity
predators
temperature
turbidity
wind
Correct answer is B
No explanation has been provided for this answer.
Evidence of organic evolution can be deduced from all the following EXCEPT
Antecology
Comparative anatomy
Embryology
Fossil records
Geographical distribution
Correct answer is A
No explanation has been provided for this answer.
Which one is NOT an essential part of a flower?
Anther
Filament
Ovary
Petal
Stigma
Correct answer is D
No explanation has been provided for this answer.