This website uses cookies to ensure you have the best experience. Learn more

The Effect Of Xxxxx On Xxxhsa

1748 words - 7 pages

香港考試局  保留版權 Hong Kong Examinations Authority All Rights Reserved 2001
2001-CE-BIO 1-1
HONG KONG EXAMINATIONS AUTHORITY
HONG KONG CERTIFICATE OF EDUCATION EXAMINATION 2001
BIOLOGY PAPER 1
8.30 am - 10.00 am (1½ hours) This paper must be answered in English
1. Attempt THREE questions only.
2. Each question consists of three parts.
3. All questions carry equal marks.
4. In each question, 2 additional marks will be awarded for effective communication.
5. The diagrams in this paper are NOT necessarily drawn to scale.
2001-CE BIO PAPER 1

2001-CE-BIO 1-2 - 1 -
1. (a) The diagram below shows a town and its surrounding areas :
(i) Domestic sewage produced in the town is first treated in the sewage treatment plant. The effluent (treated sewage) is then used to irrigate the fields.
(1) During sewage treatment, air is bubbled into the sewage continuously. Explain the importance of this step. (3 marks)
(2) Suggest two reasons why the practice of using the effluent to irrigate the fields is environmentally friendly. (2 marks)
(ii) If the same crop is grown in the fields year after year, the annual production of the fields will decrease. Suggest two reasons for this.
(2 marks)
(iii) Uncontrolled deforestation occurs in the mountain areas. Explain one way in which this activity may affect the water supply to the town.
(3 marks)

2001-CE-BIO 1-3 - 2 - Go on to the next page
1. (b) The graphs below show the concentration of three substances in the renal artery, and the changes in their concentration along the nephron and the collecting duct :
(i) Explain the difference in the concentration of protein between the blood plasma and the fluid in the nephron. (2 marks)
(ii) What process causes the increase in urea concentration along the collecting duct ? (1 mark)
(iii) (1) What may substance X be ? (1 mark)
(2) Explain the change in the concentration of substance X along the nephron. (3 marks)
(iv) If a person eats a lot of beans, how would the amount of urea excreted be affected ? Explain your answer. (4 marks)
Percentage of protein
Percentage of urea
Percentage of substance X
blood plasma in renal artery fluid in nephron fluid in collecting duct

2001-CE-BIO 1-4 - 3 -
1. (c) The X-ray photograph below shows a human molar :
(i) Using the letters in the photograph, state all the structures that is / are
(1) richly supplied with capillaries,
(2) rich in calcium salts. (2 marks)
(ii) Based on the X-ray photograph, make a labelled drawing of this tooth. (4 marks)
(iii) Explain how the process of digestion would be affected if a person lost most of this type of tooth. (3 marks)

2001-CE-BIO 1-5 - 4 - Go on to the next page
2. (a) The diagram below shows a section of the human eye :
(i) State one function of A. What feature of A contributes to this function ? (2 marks)
(ii) A small object may form an image on spot B or C, and it will be perceived differently. What is the...

Find Another Essay On the effect of xxxxx on xxxhsa

Effect of road salt on the environment

1445 words - 6 pages immediate. Most of the organism are only one cell big and blow up in contact with increased amounts of salt.Water insects are also effected by the increase in salt in the environment. The number of insects lowers because the inability for water insects to reproduces in the presence of high salt concentrations. With the decreasing numbers in microorganisms, insects and fish, it is easy to see the effect it would have on the rest of the food chain

The Effect Of Temperature On Beetroot Membranes

736 words - 3 pages The effect of temperature on the beetroot membranes Aim of the research: The aim of this investigation is to determine what kind of effect will the increasing temperature have on the plasma membrane of a beetroot cell. Introduction The beetroot contains a red pigment that is kept in the cells by the membranes. If the membranes are damaged, the pigment “betalain” will leek out. The amount of pigment that leeks out can be assessed, as

The Effect of TV Violence on Youth

1418 words - 6 pages The Effect of TV Violence on Youth In this essay I will assess whether violence on television causes violence in society. This is such a common claim that most people believe that it simply must be true. However there is no proof although some sociologists suggest that there is a relationship between the two. Teenagers are constantly being bombarded with so-called ‘parental warnings’ and ‘film certificates’ which

The Effect of Language on Perception

751 words - 3 pages The Effect of Language on Perception Language: Language is defined as any body which can be written, spoken, or otherwise communicated between individuals and/or groups. Taking this definition into account, language is not specific to human beings. Animals are also affected by a form of language. Body language is also a notable form of communication. It is a member of the type of language communicated via

The Effect of Reinforcement on Performance

2391 words - 10 pages Experiment # 1The Effect of Reinforcement on Performance&The Difference in Self-Efficacy Levels in Terms of Different Levels of ReinforcementAbstractThis study was conducted to see the effect of reinforcement on performance, and the relationship between levels of self-efficacy and the level of reinforcement provided. The hypothesis was formulated that the reinforcement provided would increase the performance of participants, and that the

The Effect of Rainwater Runoff on Soil

1006 words - 5 pages pesticides they use, pick up their dog’s feces, and stop polluting the environment, we wouldn’t have as much of a problem with surface runoff into thee environment as we do now, because our human byproducts wouldn’t be negatively effecting the environment. Next time you’re jumping through puddles in the rain just think, what else is in this water? Can it be harmful? I studied the effect of acid rainwater runoff on grass and soil. A majority of the

the effect of sleep on memory

696 words - 3 pages The Effect Of Sleep On Face Recognition Memory Sleep serves multiple purposes, ranging from restoring energy to maintaining homeostasis. Recent research has also shown that sleep plays a crucial role in memory consolidation (Scullin, 2013). There are two main types of long-term memory: explicit (declarative) memory and implicit (procedural) memory. Declarative memory is responsible for learning facts, events, and memories that can be

The Effect of Stress on Health

1161 words - 5 pages The Effect of Stress on Health Introduction Stress is a common phenomenon that affects people in some way (Barringer & Orbuch, 2013). However, the level of stress varies from mild to acute stress. Research has shown concrete evidence on the impact of stress on physical and emotional health of humans. This works explore the contribution of stress on health status. Related Research Statement of Purpose The purpose of this study is to highlight the

The Effect of Birth Order on Personality

839 words - 4 pages It may surprise you to learn that the order in which you were born can have a major effect on your personality. Recent studies have shown that whether you were the oldest, middle, youngest or even the only child in your family can greatly influence how you see the world, how you expect the world to treat you, how you treat others and also how others see and treat you. Psychologist Alfred Adler was one of the first to theorize the importance of

The effect of sensory input on metabolism

726 words - 3 pages Introduction The purpose of this investigation is to test the effect of sensory input on Lubricina metabolism. The five senses is how the human body’s function on a daily basis. The five senses include touch, hearing, smell, sight and taste. Testing many tests about the five senses and looking at the various results of the metabolism will conclude my experiment. A metabolism is a chemical occurrence that allows organisms to live. Without a

The Effect Of Caffeine On Reactions

921 words - 4 pages SC 1-The Effect of Caffeine on ReactionsVariables1. Sugar taken2. Exercise3. Activity4. Food taken5. PulsePredictionI will be investigating the pulse before and after taking coke, which contains caffeine. I predict that as you take caffeine it will speed up your reactions. I think this will happen because caffeine is a stimulant. This drug increases the blood pressure and stimulates the central nervous system, this also stimulates the action of

Similar Essays

The Effect Of Pesticides On The Environment

583 words - 2 pages The Effect of Pesticides on the Environment Whenever the subject of pesticides comes up, it's easy to point a finger at farmers. But we homeowners, with our manicured lawns and exotic flower gardens, have nothing to be smug about. Each year we pour approximately 136 million pounds of pesticides on our homes, lawns, and gardens, which amounts to three times more per acre than the average farmer applies. In fact, most of the wildlife pesticide

The Effect Of Media On The World

1194 words - 5 pages Though the letter was replaced by a tweet, and the newspaper boy was replaced by a blogger, the effect of the media on the world is unparalleled. Still, there is always going to be the question of how much, and by what means, does the media affect our lives. To try to answer this question, resources such as the Imprints textbook, multiple news articles in prominent news agencies and other sources like The Guardian and Al Jazeera, and the

The Effect Of Colonialism On The World

1378 words - 6 pages wrong place. It is true that Antigua has had their problems with a dishonest government that is more interested in stuffing their pockets with overseas money than doing anything to improve the state of education. While thinking the effects is on religion, business, and education, sometimes the effect of unfairness is left forgotten. We must realize that these are human beings that, in some cases, have just recently gained independence from their

The Effect Of Divorce On Children

1035 words - 5 pages The Effects of Divorce on the Children I decided to write on the effects of divorce on children because it touches home with not only me but for many children in the world today. Divorce can have a positive effect or it can have a negative effect on your children.In most case when the parents decide that there is no reconciliation but to separate they do not take into consideration the effect that it may have on the children. There is a sense