Diaphragm flattens; increase in volume of thoracic / chest cavity ; pressure decreases ;
sharon kalunda answered the question on May 23, 2019 at 12:43
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How does drug abuse expose one to the dangers of HIV/AIDS?.
(Solved)
How does drug abuse expose one to the dangers of HIV/AIDS?.
Date posted:
May 23, 2019
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Answers (1)
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In an experiment to observe some variations in lengths of leaves of Jacaranda, the following curve was obtained.
i) Identify the type of variation illustrated by...
(Solved)
In an experiment to observe some variations in lengths of leaves of Jacaranda, the following curve was obtained.
i) Identify the type of variation illustrated by the curve.
ii) Explain the cause of the variation you have named in (i) above.
Date posted:
May 23, 2019
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Answers (1)
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In an experiment, two equal volumes of solutions L and M were placed into visking tubings. The two viskig tubings were
suspended as shown below.
(Solved)
In an experiment, two equal volumes of solutions L and M were placed into visking tubings. The two viskig tubings were
suspended as shown below.
Explain the results that were obtained in the visking tubings at the end of the experiment.
Date posted:
May 23, 2019
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Answers (1)
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Study the diagram below and answer the questions that follow.
a) Identify the diagram above.
b) State one reason for your answer in (a) above.
c)...
(Solved)
Study the diagram below and answer the questions that follow.
a) Identify the diagram above.
b) State one reason for your answer in (a) above.
c) Name the parts labelled A and B.
Date posted:
May 23, 2019
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Answers (1)
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The set-up below shows an experiment to investigate photosynthesis.
a) What gas was collected in the test-tube.
b) What two environmental conditions are necessary for the...
(Solved)
The set-up below shows an experiment to investigate photosynthesis.
a) What gas was collected in the test-tube.
b) What two environmental conditions are necessary for the experiment?
c) What was the role of sodium hydrogen carbonate in the experiment.
Date posted:
May 23, 2019
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Answers (1)
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Explain why protein is absent in urine of a normal person.
(Solved)
Explain why protein is absent in urine of a normal person.
Date posted:
May 23, 2019
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Answers (1)
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Why is pyramid of biomass a better method of representing ecological relationships in habitats?
(Solved)
Why is pyramid of biomass a better method of representing ecological relationships in habitats?
Date posted:
May 23, 2019
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Answers (1)
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Name a respiratory substrate usually available for energy release during starvation.
(Solved)
Name a respiratory substrate usually available for energy release during starvation.
Date posted:
May 23, 2019
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Answers (1)
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Explain why a cross-circuit athlete pants heavily after sprint race.
(Solved)
Explain why a cross-circuit athlete pants heavily after sprint race.
Date posted:
May 23, 2019
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Answers (1)
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A potato cylinder measuring 100 mm was placed in a concentrated salt solution for 30 minutes. Describe its texture and
appearance after 30 minutes.
(Solved)
A potato cylinder measuring 100 mm was placed in a concentrated salt solution for 30 minutes. Describe its texture and
appearance after 30 minutes.
Date posted:
May 23, 2019
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Answers (1)
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State two disadvantages of fossil records as an evidence of evolution.
(Solved)
State two disadvantages of fossil records as an evidence of evolution.
Date posted:
May 23, 2019
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Answers (1)
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State the importance of the following processes to living organisms.
a) Locomotion.
b) Irritability
(Solved)
State the importance of the following processes to living organisms.
a) Locomotion.
b) Irritability
Date posted:
May 23, 2019
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Answers (1)
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Explain why herbivores have large eyes on their sides?
(Solved)
Explain why herbivores have large eyes on their sides?
Date posted:
May 22, 2019
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Answers (1)
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The following micrographs show images taken from a transverse section of a various stems by
a light microscope. Analyze them closely and use them to answer...
(Solved)
The following micrographs show images taken from a transverse section of a various stems by
a light microscope. Analyze them closely and use them to answer questions that follow.
a)On the diagram, label part A, B and C
b) Explain the adaptation of the parts C and D to their functions
c) Identify five differences between cross section T and Q.
d) Explain how part B facilitates the process of secondary growth
Date posted:
May 22, 2019
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Answers (1)
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The Diagram below shows two organisms (R and S) belonging to the same phylum
(a) Name the class in which the organisms shown above belong.
i)...
(Solved)
The Diagram below shows two organisms (R and S) belonging to the same phylum
(a) Name the class in which the organisms shown above belong.
i) Organism R
ii) Organism S
b) Other than presence of exoskeleton, list two observable similarities between the two organisms
c) List two observable differences between the two organisms
d) Explain how the organism labelled R is adapted to safeguard itself from the predator
e) (i) Name the gaseous exchange system exhibited by organism S
ii) State the respiratory surface used by organism S
Date posted:
May 22, 2019
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Answers (1)
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Describe the process of exhalation in mammals.
(Solved)
Describe the process of exhalation in mammals.
Date posted:
May 22, 2019
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Answers (1)
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Discuss/Describe gaseous exchange in alveolus.
(Solved)
Describe gaseous exchange in alveolus.
Date posted:
May 22, 2019
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Answers (1)
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An experiment was set up to demonstrate the necessity of carbon (IV) oxide for
photosynthesis in a certain green plant as shown below. The plant was...
(Solved)
An experiment was set up to demonstrate the necessity of carbon (IV) oxide for
photosynthesis in a certain green plant as shown below. The plant was first kept
darkness for 48 hours before the experiment.
a), Why was the plant kept in darkness for 48 hours before the start of this experiment.
b), What was the role of sodium hydroxide?
ci)What was the results shown by the leaf in the flask when it was tested for presence of starch after
the set up was exposed to light for a day?.
ii), Give reasons for your answer in (c) I above
d. Suggest a control for this experiment.
e), Name other two limiting factors in this experiment.
Date posted:
May 22, 2019
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Answers (1)
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Name two harmones that bring about rapid cell division in plants
(Solved)
Name two harmones that bring about rapid cell division in plants
Date posted:
May 22, 2019
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Answers (1)
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In an experiment a group of students set up the test tubes as shown below
a), What was the aim experiment?
b), Why was pyrogallic acid...
(Solved)
In an experiment a group of students set up the test tubes as shown below
a), What was the aim experiment?
b), Why was pyrogallic acid included in the gas jar. A?
c), What results would you expect in each of the gas jar A and B at the end of experiment?
Date posted:
May 22, 2019
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Answers (1)