Get premium membership and access questions with answers, video lessons as well as revision papers.
Animal cells: Sperm cell; has acrosome containing lytic enzymes; that digest the egg membranes for penetration during fertilization; has a long tail; containing numerous mitochondria; to generate maximum energy for propulsion/swimming in the vaginal fluid after ejaculation; Red blood cells; are flattened, circular/spherical biconcave in shape; to increase the surface area for packaging of haemoglobin; has haemoglobin; that combines with respiratory gases; for transport to and from body tissues; White blood cells; are amoeboid in shape hence able to change shape; to engulf pathogens through phagocytosis; lymphocytes produce antibodies to fight pathogens; Nerve cell; has extensions/dentrites; to receive and send information for sensation; Ciliated epithelial cells; have cilia for propulsion of mucus that traps dust and micro-organisms in the respiratory tract; Muscle cells; elongated, striated and contractile; to bring about movement; Plant cells: Guard cells; bean-shaped; to regulate the size of the stomata allowing gaseous exchange; and control water loss; has chloroplasts with chlorophyll; for photosynthesis; Root hair cell; elongated; thin-walled; with dense cytoplasm for absorption of water and mineral salts; Epidermal cell; thin; for protection of inner tissues from mechanical and micro-organism attack; Palisade cell; contains numerous chloroplasts with chlorophyll; for photosynthesis; elongated; to increase surface area for trapping maximum amounts of light energy; Meristematic cell; thin-walled; with dense cytoplasm; for primary and secondary growth;
Kavungya answered the question on March 12, 2019 at 11:54
- Explain the ways in which a typical cell is adapted to its functions.(Solved)
Explain the various ways in which a typical cell is adapted to its functions
Date posted: March 12, 2019. Answers (1)
- State how the epithelial tissue is adapted to its function (Solved)
State how the epithelial tissue is adapted to its function
Date posted: March 10, 2019. Answers (1)
- State two characteristics of division Bryophyta(Solved)
State two characteristics of division Bryophyta.
Date posted: March 10, 2019. Answers (1)
- Explain why bile is an excretory product as well as a digestive secretion.(Solved)
Explain why bile is an excretory product as well as a digestive secretion.
Date posted: March 10, 2019. Answers (1)
- Where does meiosis occur in:
(i)Plants?
(ii)Mammals?(Solved)
Where does meiosis occur in:
(i)Plants?
(ii)Mammals?
Date posted: March 10, 2019. Answers (1)
- State two ways of controlling schistosomiasis.(Solved)
State two ways of controlling schistosomiasis.
Date posted: March 10, 2019. Answers (1)
- State three external characteristics that distinguish mammals from other vertebrates.(Solved)
Stare three external characteristics that distinguish mammals from other vertebrates.
Date posted: March 10, 2019. Answers (1)
- What is meant by 'survival of the fittest'?(Solved)
What is meant by 'survival of the fittest'?
Date posted: March 10, 2019. Answers (1)
- State the structures for gaseous exchange in the following organisms:
(i)Amoeba.
(ii)Butterfly.(Solved)
State the structures for gaseous exchange in the following organisms:
(i)Amoeba.
(ii)Butterfly.
Date posted: March 10, 2019. Answers (1)
- Distinguish between excretion and homeostasis.(Solved)
Distinguish between excretion and homeostasis.
Date posted: March 10, 2019. Answers (1)
- The population of fish pond in a pond was estimated using capture-recapture method.
(i)What equipment was used?
(ii)Describe the procedure used in the experiment.
(iii)State the formula...(Solved)
The population of fish in a pond was estimated using capture-recapture method.
(i)What equipment was used?
(ii)Describe the procedure used in the experiment.
(iii)State the formula for calculating the total population of fish in the pond.
Date posted: March 10, 2019. Answers (1)
- (a)(i)State two reasons why clot formation is important, when a blood vessel is cut.
(ii)Explain what happens if a clot forms in a blood vessel in...(Solved)
(a)(i)State two reasons why clot formation is important,when a blood vessel is cut.
(ii)Explain what happens if a clot forms in a blood vessel in the head.
(b)State two components of the diet that are needed in blood clotting.
(c)Name two proteins that are involved in clot formation.
Date posted: March 10, 2019. Answers (1)
- Elaborate on how soil nutrient composition affects photosynthesis?(Solved)
Elaborate on how soil nutrient composition affects photosynthesis?
Pay attention to how soil nutrient composition with regard to macro and micro nutrients affects photosynthesis, other factors remaining constant.
Date posted: March 9, 2019. Answers (1)
- State the function of the choroid in the human eye.(Solved)
State the function of the choroid in the human eye.
Date posted: March 8, 2019. Answers (1)
- State two characteristics of living things that are observable in both plants and animals.(Solved)
State two characteristics of living things that are observable in both plants and animals.
Date posted: March 8, 2019. Answers (1)
- Name three structures observed in an animal cell using a light microscope.(Solved)
Name three structures observed in an animal cell using a light microscope.
Date posted: March 8, 2019. Answers (1)
- State three harmful effects of alcohol (ethanol)to human health.(Solved)
State three harmful effects of alcohol (ethanol) to human health.
Date posted: March 8, 2019. Answers (1)
- Name two dental diseases.(Solved)
Name two dental diseases.
Date posted: March 8, 2019. Answers (1)
- State the role of the following hormones.(i)Follicle stimulating hormone.(ii)Progesterone.(Solved)
State the role of the following hormones.
(i)Follicle stimulating hormone.
(ii)Progesterone.
Date posted: March 8, 2019. Answers (1)
- State the function of pleural fluid during breathing in humans(Solved)
State the function of pleural fluid during breathing in humans.
Date posted: March 8, 2019. Answers (1)