Which one is NOT an excretory product of man?
- A. carbon(iv)oxide
- B. oxygen
- C. nitrogenous wastes
- D. salts
- E. respiration
The most likely mode of an organism that possesses attachment structure, thin outer surface layer and absence of an elaborate digestive tract is
- A. Autotropic
- B. holophytic
- C. parasitic
- D. saprophytic
- E. symbiotic
What is the result of placing a red blood cell in a hypertonic solution ?
- A. crenation
- B. haemolysis
- C. osmosis
- D. plasmolysis
- E. wilting
Two identical twin boys had different finger print. This proves that
- A. finger print is a sex-linked character
- B. the genotypes of the twins are similar
- C. the phenotypes of the twins are similar
- D. there are morphological variations
- E. there are physiological variation in the twins
The part of the fruit which serves a protective function is called
- A. endocary
- B. epicarp
- C. mesocarp
- D. pericarp
- E. testa
Modern method of classification of living things is based on similarity of?
- A. colour
- B. habitat
- C. shape
- D. size
- E. structure
Which of the following is NOT a natural source of energy ?
- A. coal
- B. electricity
- C. food
- D. sun
- E. water
An essential with the dental formula I 0/3 : C 0/1 : P 3/3 : M 3/3 is most likely adapted for ___________ nutrition .
- A. carnivorous
- B. herbivorous
- C. holophytic
- D. ominivorous
- E. parasitic
The release of sperms through the urethral opening into the vagina is called?
- A. copulation
- B. ejaculation
- C. fertilization
- D. spermatogenesis
- E. urination
Which of these statements is NOT an idea contained in Lamarck’s theory of evolution.?
- A. acquired characters are inheritable
- B. changes in the environment result in corresponding changes in the species
- C. environmental changes cause the organism to acquire new structures as an adjustment to a new prevailing environment
- D. organisms develop specialized characteristic by use and disuse of organs
- E. organisms tend to an increase in number at an exponential rate
Lianas is to tropical rain forest as an extensive root system is to —————- habitat
- A. afro-alpine
- B. estuarine
- C. fresh - water
- D. grass-land
- E. marine
Which material is NOT necessary for the manufacture of plant food?
- A. carbon(iv)oxide
- B. chloropyll
- C. oxygen
- D. sunlight
- E. water
Which of the following agricultural activities has the least harmful effect on the environment ?
- A. application of fertilizers
- B. practicing crop rotation
- C. practicing monocropping
- D. spraying herbicides
- E. spraying pesticides
When a student suddenly runs into a snake on a pathway, which of these chemical messengers are released ?
- A. adrenaline
- B. insulin
- C. oestrogen
- D. testosterone
- E. thyroxine
A common characteristic of ALL living things is
- A. gametogenesis
- B. hibernation
- C. photosynthesis
- D. phototropism
- E. respiration
An organism existing at the colonial level of life is
- A. chlamydomonas
- B. euglena
- C. paramecium
- D. spirogyra
- E. volvox
Root pressure and the transpiration pull are biophysical processes which account for the?
- A. ascent of water into leaves
- B. exchange of gases at leaf surfaces
- C. movement of manufactured food from leaves to storage tissues
- D. opening and closing of stomata
- E. Release of energy from glucose molecules
Which statement about decomposers is NOT true?
- A. They are saprophytes
- B. They carry on intra-cellular digestion
- C. They facilitate the cleansing of the environment
- D. They facilitate the recycling of nutrients
- E. They form a link between autotrophs and heterotrophs
Which of these pairs best illustrates symbiotic association?
- A. dodder on green plants
- B. ferns growing on palm trees
- C. lice on hair of mammals
- D. sea anemone attached to hermit crab
- E. tick found on body of cow
The process which ensures that the chromosome number for each species of organism remains constant from generation to generation is called
- A. fission
- B. fusion
- C. meiosis
- D. mitosis
- E. oogenesis
Which of the following sequences best illustrates a food chain in an aquatic habitat ?
- A. algae → fungi → toad → snake
- B. diatoms → tadpole → fish → kingfisher
- C. grass → grasshopper → toad → whale
- D. phytoplankton → fish → snake → kingfisher
- E. zooplankton → tadpoles → fish → kingfisher