A trait that is always expressed during crossing of hereditary characteristics is
- A. recessive trait
- B. dominant trait
- C. homozygous trait
- D. heterozygous trait
In blood transfusion, a patient with group AB receives
- A. Group A, B, AB
- B. Group O, A, B
- C. Group O, B, AB
- D. Group O, A, B, AB
One of the following is a courtship behaviour in animals
- A. fighting
- B. display
- C. hibernation
- D. feeding
Production of healthier offspring, viable seeds and formation of new varieties are good characteristics
- A. self pollination
- B. cross pollination
- C. wind pollination
- D. insect pollination
The pigment carrying oxygen in the blood is
- A. plasma
- B. haemoglobin
- C. oxyhaemoglobin
- D. erythrocytes
Energy transfer in plants and animals are in the form of
- A. DNA
- B. ATP
- C. GTP
- D. RNA
In which zone of the marine habitat does the organisms require adaptation for attachment?
- A. Supratidal
- B. Subtidal
- C. intertidal
- D. abyssal zone
Xerophytes are mostly found in the
- A. arid land
- B. tropical rainforest
- C. montane forest
- D. Sudan savanna
A photosynthetic carnivorous plant which feeds on insects is
- A. parasitic
- B. saprophytic
- C. herbivorous
- D. insectivorous
The feeding relationship between ruminants and the bacteria in their digestive tract is
- A. saprophytic
- B. parasitic
- C. symbiotic
- D. heterotrophic
Pentadactyl forelimb of vertebrate function due to differences in environment is
- A. comparative anatomy
- B. physiological evidence
- C. embryological evidence
- D. fossil records
Which of the following evidences of evolution employs the use of radio-isotope dating?
- A. comparative anatomy
- B. Embryology
- C. Fossil records
- D. vestigial organs
Use the diagram above to answer the question that follows
The organ is responsible for
- A. production of heat
- B. osmoregulation
- C. vasoconstriction
- D. production of hormones
After fertilization in plants, the zygote develops into
- A. fruit
- B. an embryo
- C. seed
- D. an endosperm
The oxygen transported to all parts of the body during blood circulation is used for the
- A. growth and development of cells
- B. removal of waste products
- C. release of energy from food
- D. formation of carboxyl haemoglobin
The cells responsible for transmitting messages to the effectors are
- A. motor neurons
- B. sensory neurons
- C. hair cells
- D. relay neurons
The abiotic factor that affect the population growth of an organism is
- A. predator
- B. rainfall
- C. food shortage
- D. disease
The chemical and physical composition of soil is an example of
- A. climatic factor
- B. topographic factor
- C. Edaphic factor
- D. chemical factor
Which of the following statements explains the theory of natural selection?
- A. There is no struggle for existence
- B. New species get better adaptation
- C. The weaker offspring are eliminated
- D. Unused structures disappear later
One of the components of xylem tissue is
- A. companion cell
- B. tracheid
- C. sieve tube
- D. epidermal
One of the characteristics of secondary succession is that it
- A. starts on a bare surface
- B. takes longer time to reach climax
- C. starts on already colonized surface
- D. starts with low organism