A major difference between platyhelminthees and coelenterates is that platyhelminthes
are multicellular
have developed a mesoderm
reproduce sexually
reproduce asexually
Correct answer is B
No explanation has been provided for this answer.
Which of the following lists of diseases, their causes and transmission is CORRECT?
Cholera, virus, severe diarrhoea, infected water
Malaria, protozoan, high fever, contact with infected person
Syphilis, virus, veneral disease, sexual intercourse
small pox, virus, skin with blister, close contact with infected person
Sleeping sickness, bacteria, tiredness, headache and dozing, tsetsefly bite
Correct answer is D
No explanation has been provided for this answer.
Which of the following groups of factors is completely abiotic?
Salinity, tide, plankton, turbidity
Temperaure, pH, soil, insect
Wind, altitude, humidity, light
Conifers, wind, pH, rainfall
Soil, water, bacteria, salinity
Correct answer is C
No explanation has been provided for this answer.
Which of the following is NOT regarded as a pollutant on land or in the air?
smoke
noise
sulphur (IV) oxide
carbon monoxide
nitrogen
Correct answer is E
No explanation has been provided for this answer.
An anemometer is an instrument for measuring
relative humidity
altitude
wind speed
turbidity
salinity
Correct answer is C
No explanation has been provided for this answer.