2019 - JAMB Biology Past Questions and Answers - page 4
Rabbits cannot survive in an aquatic habitat because they have
fore and hind limbs
no gills
no fins
no scales
The reason is that rabbits do not have the adaptive features of an aquatic habitat like gills therefore, it cannot survive in an aquatic habitat.
Which of the following substances pass through the root cell membrane by osmosis?
Ceil sap
Carbon dioxide
Oxygen
Water
Water passes through the root cell membrane of a plant in so that osmosis to take place.
Trees in Savanna habitats usually have thick bark which mainly.
Reduces the rate of transpiration
Protect them from scorching sun
Protect them from heavy winds
Resist bush fires
The reason why the rate of transpiration is reduced in savannah forest is because of thick barks of the trees in savannah forest.
Competition among individuals of a population increases the
Number of organisms
Availability of nutrient supplied
Survival of the fittest
Enlargement of the territory
In natural selection, Darwin proposed that evolution occurred because of the following conditions except
that nature selects those that will survive to reproduce their kind
there is a fierce competition among the offspring
that the weaker offspring are eliminated
food and other needs are abundant
The theory of evolution by natural selection, first formulated in Darwin's book "On the Origin of Species" in 1859, is the process by which organisms change over time as a result of changes in heritable physical or behavioural traits.
Which of the following substances has the highest amount of energy in joules per unit weight?
Carbohydrates
Fats
Proteins
Vitamins
Fats provide more energy to animals than carbohydrates do. Fats, therefore, contains highest amount of energy in joules per unit weight.
Which of the following pairs of scientists discovered the Rhesis factor in human blood?
Hooke and Lavine
Darwin and Landsteiner
Landsteiner and Lavine
Hooke and Darwin
Landsteiner and Lavine are scientists that discovered the Rhesus factor in human blood.
The study of an individual organism or a single species of organism and its environment is
Autecology
Ecological concepts
Synecoloy
Biotic composers
Autecology, also called Species Ecology, the study of the interactions of an individual organism or a single species with the living and nonliving factors of its environment.
Which of the following is a nitrifying bacterium?
Rhizobium
Nictrobacter
Azotobacter
Pseudomonas
Nitrobacter is a chemoautotrophic organism found in soil and water responsible for the oxidation of ammonium to nitrite and nitrite to nitrate.
Nitrifying bacteria are chemolithotrophic organisms that include species of the genera Nitrosomonas, Nitrosococcus, Nitrobacter and Nitrococcus. These bacteria get their energy by the oxidation of inorganic nitrogen compounds. Types include ammonia-oxidizing bacteria and nitrite-oxidizing bacteria.
Which of the following is the effect of using artificial pollination in plant breeding?
Production of healthy crops
Lengthening the maturity time of crops
Making crops susceptible to disease
Improvement of the variety of crops
Artificial pollination in plant breeding improves the variety of crops.