(a) Tropisms or Geotropism.
(b) Gravity causes a greater concentration of auxins to diffuse and accumulate on the lower side of roots ; High auxin
concentration on lower part of root inhibit growth on lower part of roots while low concentration of auxins on the upper side promotes faster growth ; hence the root bends downwards ;
sharon kalunda answered the question on May 24, 2019 at 09:55
- Name two sex-linked characteristics in human determined by genes located on Y- chromosome.(Solved)
Name two sex-linked characteristics in human determined by genes located on Y- chromosome.
Date posted: May 24, 2019. Answers (1)
- The graph below represents the growth in a certain phylum.
(a) Name the type of growth pattern shown on the graph.
(b) Identify the process represented...(Solved)
The graph below represents the growth in a certain phylum.
(a) Name the type of growth pattern shown on the graph.
(b) Identify the process represented by X.
(c) Name the hormone responsible for the process in (b) above.
Date posted: May 24, 2019. Answers (1)
- What characteristics do mammalian lungs and the gills of bony fish have in common that enables them to exchange gases efficiently?(Solved)
What characteristics do mammalian lungs and the gills of bony fish have in common that enables them to exchange gases efficiently?
Date posted: May 24, 2019. Answers (1)
- What is the importance of chewing food?(Solved)
What is the importance of chewing food?
Date posted: May 24, 2019. Answers (1)
- State two adaptation of herbivorous which enable them to digest cellulose?(Solved)
State two adaptation of herbivorous which enable them to digest cellulose?
Date posted: May 24, 2019. Answers (1)
- Study the diagram below and answer the following questions.
(a) Name the muscles labelled A and B.
(b) What happens to each muscle as the arm...(Solved)
Study the diagram below and answer the following questions.
(a) Name the muscles labelled A and B.
(b) What happens to each muscle as the arm is straightened?
(c) Name the type of joint present in part labelled X.
Date posted: May 24, 2019. Answers (1)
- State the importance of the following features in gaseous exchange;
(i) The presence of cartilage in trachea and bronchi.
(ii) Alveoli, gill filaments and tracheoles being...(Solved)
State the importance of the following features in gaseous exchange;
(i) The presence of cartilage in trachea and bronchi.
(ii) Alveoli, gill filaments and tracheoles being numerous in the respective organisms where they occur.
Date posted: May 24, 2019. Answers (1)
- Give three prevention measures of cholera.(Solved)
Give three prevention measures of cholera.
Date posted: May 24, 2019. Answers (1)
- With a reason, name the organelles that would be found in large numbers in cell of secretory glands.(Solved)
With a reason, name the organelles that would be found in large numbers in cell of secretory glands.
Date posted: May 24, 2019. Answers (1)
- The diagram below shows a part of nephron. Study it and answer the questions that follow.
(a) Name the parts labelled A and B.
(b) Name the...(Solved)
The diagram below shows a part of nephron. Study it and answer the questions that follow.
(a) Name the parts labelled A and B.
(b) Name the process by which the fluid found in D is formed.
Date posted: May 24, 2019. Answers (1)
- The table provided below shows stomata distribution on leaves A and B and their surface area.
(a) Identify the habitats of the plant from which leaf...(Solved)
The table provided below shows stomata distribution on leaves A and B and their surface area.
(a) Identify the habitats of the plant from which leaf A was obtained.
(b) Give a reason for your answer in (a) above.
Date posted: May 24, 2019. Answers (1)
- Distinguish between Blood plasma and serum.(Solved)
Distinguish between Blood plasma and serum.
Date posted: May 24, 2019. Answers (1)
- Give two nitrogenous bases in a DNA molecule.(Solved)
Give two nitrogenous bases in a DNA molecule.
Date posted: May 24, 2019. Answers (1)
- The diagram below illustrate the flow of blood and water within the respiratory surface in fish.
(a) Name the term used for this arrangement.
(b) Explain...(Solved)
The diagram below illustrate the flow of blood and water within the respiratory surface in fish.
(a) Name the term used for this arrangement.
(b) Explain the significance of the arrangement.
Date posted: May 24, 2019. Answers (1)
- State three sites of gaseous exchange in mesophytes.(Solved)
State three sites of gaseous exchange in mesophytes.
Date posted: May 24, 2019. Answers (1)
- The diagram below shows an experiment on germination peas.
a) (i) What changes are observable at the end of the experiment?
(ii) Give the reason the...(Solved)
The diagram below shows an experiment on germination peas.
a) (i) What changes are observable at the end of the experiment?
(ii) Give the reason the observation in a(i) above.
(b) If water had been used instead of caustic potash in the experiments, what would be observed?
Date posted: May 24, 2019. Answers (1)
- State one use for each of the following apparatus in the study of living organisms.
(a) Hand lens.
(b) Pair of forceps.(Solved)
State one use for each of the following apparatus in the study of living organisms.
(a) Hand lens.
(b) Pair of forceps.
Date posted: May 24, 2019. Answers (1)
- Why does food stored in a refrigerator remain unspoiled longer than it does under ordinary conditions?(Solved)
Why does food stored in a refrigerator remain unspoiled longer than it does under ordinary conditions?
Date posted: May 24, 2019. Answers (1)
- Explain how various human activities cause soil pollution.(Solved)
Explain how various human activities cause soil pollution.
Date posted: May 24, 2019. Answers (1)
- Describe the way by which terrestrial plants are adapted to living in arid and semi-arid ecosystems.(Solved)
Describe the way by which terrestrial plants are adapted to living in arid and semi-arid ecosystems.
Date posted: May 24, 2019. Answers (1)