Biology Past Questions And Answers
Organisms that feed essentially on plants within any ecosystem may be referred to as
- A. carnivores
- B. herbivores
- C. saprophytes
- D. omnivores
The condition that encourages denitrification is
- A) low soil oxygen
- B) high soil nitrogen
- C) absence of soil bacteria
- D) lighting and thunderstorm
The order of passage of food in the digestive system is?
- A. ileum → caecum → large intestine → rectum
- B. ileum → colon → caecum →rectum
- C. large intestine →ileum → caecum →rectum
- D. colon → caecum → ileum →rectum
If the cross of a red-flowered plant with a white-flowered plant produces a pink-flowered plant, it is an example of
- A. codominance
- B. incomplete dominance
- C. mutation
- D. linkage
The diagram below is an illustration of the foot of an animal.
The adaptation of this type of foot is that it is?
- A. used as a bait to catch fish in water
- B. used as a paddle for swimming
- C. effective in scratching the soil for food
- D. used for killing prey in water
Nucleic acids carry the information of what your cells will do. An example of a nucleic acid would be which of the following?
- A. Carbon
- B. Asparagine
- C. RNA
- D. Cellulose
Which of the following statements best describes pollination? The transfer of pollen grain from
- A. anther to stigmas
- B. stigmas to stamens
- C. the anther of a flower to the stigma of another flower of a different species
- D. anther to the ovary
Which of the following statements is not correct about the mammalian heart?
- A. Oxygenated blood enters the left auricle from the pilmonary vein
- B. the walls of the ventricle are thicker than those of the auricle
- C. blood passes from of blood into the right ventricle to the left auricle through the aorta
- D. the tricuspid valve prevents the back flow of blood into the right auricle
Which of the following traits is not visible in a person with Down syndrome?
- A. Short neck
- B. High muscle tone
- C. Small stature
- D. Slant eyes
Which of the following is an example of active transport?
- A. Oxygen exchanging between red blood cells and liver cells
- B. Carbon dioxide exchanging between muscle cells and red blood cells
- C. Water moving out of the small intestine
- D. Sodium being reabsorbed in the kidney