Which of the following is a nitrifying bacterium?
Rhizobium
Nictrobacter
Azotobacter
Pseudomonas
Correct answer is B
Nitrobacter are chemoautotrophic organisms found in soil and water, and responsible for the oxidation of ammonium to nitrite and nitrite to nitrate.
The study of an individual organism or a single specie of an organism and its environment is
Autecology
Ecological concepts
Synecology
Biotic composers
Correct answer is A
Autecology is the study of an individual organism or a single specie of organism and no environment
Which of the following pairs of scientists discovered the Rhesus factor in human blood?
Hooke and Lavine
Darwin and Landsteiner
Landsteiner and Lavine
Hooke and Darwin
Correct answer is C
Landsteiner and Lavine are the scientists that discovered the Rhesus factor in human blood.
Which of the following substances has the highest amount of energy in joules per unit weight?
Carbohydrates
Fats
Proteins
Vitamins
Correct answer is B
Fats provide more energy to animals than carbohydrates therefore containing the highest amount of energy in joules per unit weight.
Competition among individuals of a population increases the
Number of organisms
Availability of nutrient supplied
Survival of the fittest
Enlargement of the territory
Correct answer is C
Competition one of the biotic factors in ecological factors involves the interactions among two organisms of the same species/different species which outgrows the other and survives while the other cannot grow or survive