The study of an individual organism or a single species of organism and its environment is
- A. Autecology
- B. Ecological concepts
- C. Synecology
- D. Biotic composers
Which of the following pairs of scientists discovered the Rhesus factor in human blood?
- A. Hooke and Lavine
- B. Darwin and Landsteiner
- C. Landsteiner and Lavine
- D. Hooke and Darwin
Which of the following substances has the highest amount of energy in joules per unit weight?
- A. Carbohydrates
- B. Fats
- C. Proteins
- D. Vitamins
In natural selection, Darwin proposed that evolution occurred because of the following conditions except
- A. that nature selects those that will survive to reproduce their kind
- B. there is a fierce competition among the offspring
- C. that the weaker offspring are eliminated
- D. food and other needs are abundant
Competition among individuals of a population increases the
- A. Number of organisms
- B. Availability of nutrient supplied
- C. Survival of the fittest
- D. Enlargement of the territory
Trees in Savanna habitats usually have thick bark which mainly.
- A. Reduces the rate of transpiration
- B. Protect them from scorching sun
- C. Protect them from heavy winds
- D. Resist bush fires
Which of the following substances pass through the root cell membrane by osmosis?
- A. Ceil sap
- B. Carbon dioxide
- C. Oxygen
- D. Water
Rabbits cannot survive in an aquatic habitat because they have
- A. fore and hind limbs
- B. no gills
- C. no fins
- D. no scales
Which of the following type of soil has the highest water retaining capacity?
- A. Loam
- B. Laterite
- C. Clay
- D. Sand
Which of the following is an example of discontinuous variation?
- A. The range in height of a pea plant from 30cm to 50cm
- B. Offsprings including two male cats and three female cats
- C. The colour of pear plants grown in the dark
- D. The adult body weight ranging from 50kg to 95kg
In plants, respiration occurs in
- A. The stomata and lenticel only
- B. Mesophyll cells only
- C. All living cells
- D. The root only
The specific portion of a habitat which is occupied by a particular species is referred to as
- A. Ecological population
- B. Ecological niche
- C. Biotic community
- D. Ecosystem
The sum total of adaptive changes from pre-existing form that have taken place over a long time resulting in diversity of forms, structures and functions among organism is referred to as
- A. Specification
- B. Inorganic Evolution
- C. Evolution
- D. Organic Evolution
Which of the following are components of glomerular filtrate?
- A. All the components of blood except mineral salts
- B. Water and salt only
- C. All the components of blood except plasma protein and cells
- D. Blood cells, amino acid, salts and nitrogenous wastes
Which of the following structures controls the activities of the living cell?
- A. Nucleus
- B. Centrosome
- C. Mitochondrion
- D. Golgi body
Reading the verdict of a case by a magistrate is an example of
- A. A reflex action
- B. An instinct
- C. A conditioned reflex
- D. A voluntary action
The number of times an organism occurs within a given area of a habitat is referred to as
- A. Population growth rate
- B. Population frequency
- C. Population growth rate
- D. Population density
A population is best described as
- A. A group of the same species of organisms living together
- B. A group of animals and plants living together
- C. A group of insects and grasses
- D. Different species of wild animals
A virus can sometimes be regarded as a living organism because it
- A. causes diseases in plants and animals
- B. It exists in a variety of shapes
- C. Is easily visible with the aid of an electron microscope
- D. Reproduces in living cells
One important characteristics of green plant is that they
- A. possess specialized sense organs
- B. Are usually motile
- C. Are autotropic
- D. Respond slowly to stimuli
The above organism can be classified under which phylum in the animal kingdom
- A. Nematoda
- B. Chordata
- C. Porifera
- D. Annelida