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Describe five types of symbiotic relationships in a natural ecosystem
Date posted:
May 13, 2021
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Discuss the various ways employed by preys to avoid the predators
Date posted:
May 13, 2021
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Discuss how the various tropisms adapt plants to their habitats
Date posted:
May 13, 2021
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Outline the activities that occur in the body when one touches a hot object
Date posted:
May 13, 2021
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Explain how bony fish are adapted to their habitats
Date posted:
May 13, 2021
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Why is locomotion necessary in higher animals?
Date posted:
May 13, 2021
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Discuss three examples of natural selection in action
Date posted:
May 13, 2021
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How is the mammalian gaseous exchange system adapted to its functions?
Date posted:
May 13, 2021
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Describe what happens in a flower from the time of pollination up to the time of seed and fruit development
Date posted:
May 13, 2021
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Outline the differences between wind and insect pollinated flowers
Date posted:
May 13, 2021
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How are xerophytes and hydrophytes adapted to their habitats
Date posted:
May 13, 2021
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Discuss the causes, effects and control measures for water pollution
Date posted:
May 13, 2021
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Discuss the various ways in which anaerobic respiration is utilized in industries and homes .
Date posted:
May 13, 2021
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Discuss the various mechanisms of opening and closing of stomata
Date posted:
May 13, 2021
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Explain how mammalian bodies regulate glucose and protein levels in their blood
Date posted:
May 13, 2021
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Describe the process of urine formation in the mammalian kidneys
Date posted:
May 13, 2021
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Describe double circulation in mammals
Date posted:
May 13, 2021
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Name any three factors that must be maintained constant in mammalian bodies
Date posted:
May 13, 2021
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Outline and explain the various homeostatic functions of the liver in mammals
Date posted:
May 13, 2021
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What is the importance of a balance diet in human nutrition?
Date posted:
May 13, 2021
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What is digestion?
Date posted:
May 13, 2021
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Explain why the following conditions are necessary for photosynthesis
a. Carbon (IV) Oxide
b. Light
c. Chlorophyll
d. Suitable temperature and pH
e. Water
Date posted:
May 13, 2021
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Following a prolonged period of marketing activity, a chain of private health clinics has recently opened a number of clinics in towns across a part of the country it had not previously operated in. The organization now wants to know whether and to what extent potential customers are aware of them. Your agency has been awarded the contract to carry out this research. The client wants the survey conducted face-to-face but does not want to use any form of street intercept for the survey as this is not permitted within some of the towns where they have opened their new clinics.
a) Describe at least two sampling methods which could be used for this survey, outlining the advantages and disadvantages of each of the methods chosen.
b) Which sampling method would you recommend? Give reasons for your choice.
Date posted:
May 13, 2021
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Last year, a large retail company, with 5,000 employees in branches around the country launched its Well At Work initiative. Well At Work provides a range of confidential services to improve staff morale and wellbeing. This range includes services such as free health checks, free financial advice and support to stop smoking. The company wants to find out how staff view these services, how useful they are, and if they have helped improve staff satisfaction. They have asked all employees to complete an online research questionnaire which contains the following questions.
The company would like to know which staff groups, according to grade and geographic area, are making most use of the services. The HR Director has asked to look at the completed questionnaires so she can get a feel for the results for each area and staff group. You realize she may be misled by or she may misinterpret the raw data.
a) Identify at least two issues which should be taken into account when comparing the raw data for the different groups, stating why these issues are important.
b) Describe at least two ways in which you might analyze the data in order to provide the company with the robust information they need. Giving reasons for the suggestions you make.
Date posted:
May 13, 2021
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The current through a 0.1-H inductor is i(t)=10te-5tA. Find the
(a) Voltage across the inductor and
(b) The energy stored in it.
Date posted:
May 12, 2021
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Figure 6.2 shows a rectangular loop of wire immersed in a nonuniform and varying magnetic
field B that is perpendicular to and directed into the page. The field’s magnitude is given by
B=4t2x2 , with B in teslas, t in seconds, and x in metres. The loop width w = 2.0 m and length l
= 3.0 m. What are the magnitude and direction of the induced emf around the loop at t = 0.10 s?
Date posted:
May 12, 2021
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A coil consists of 200 turns of wire having a total resistance of 2.0 Ω. Each turn is a square of
side 18cm, and a uniform magnetic field directed perpendicular to the plane of the coil is turned
on. If the field changes linearly from 0 to 0.50 T in 0.80 s, what is the magnitude of the induced
emf in the coil while the field is changing?
Date posted:
May 12, 2021
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A long, straight wire carries a current of 5.00 A. At one instant, a proton, 4.00 mm from the wire,
travels at 1.50 x103 m/s parallel to the wire and in the same direction as the current (Fig.5.2).
(a) Find the magnitude and direction of the magnetic field created by the wire.
(b) Find the magnitude and direction of the magnetic force the wire’s magnetic field exerts on the proton.
Date posted:
May 12, 2021
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A long, straight wire of radius R carries a steady current I0 that is uniformly distributed through
the cross-section of the wire (Fig. 5.1). Using Ampere’s law, calculate the magnetic field a
distance r from the center of the wire in the regions r > R and r < R .
Date posted:
May 12, 2021
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State Ampere’s Law.
Date posted:
May 12, 2021