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We live in a dynamic world, and habitats are always undergoing changes at all sorts of levels. However, natural changes usually occur at a slow pace so that impacts on individual species tend to be slight - at least in the short term
When the pace of change is greatly accelerated, there may be no time for individual species to react to new circumstances, and the effects can be disastrous. Briefly, this is the reason that rapid habitat loss is regarded as the chief cause of species endangerment, and there is no force more powerful in this regard than human beings. To some extent, every part of the earth has been affected by human activities, especially during this past century. This applies on virtually every scale, from the loss of microbes in soils that once supported tropical forests, to the extinction of fish and other aquatic species in polluted freshwater habitats, to changes in global climate caused by the release of greenhouse gases. From the perspective of an individual human lifetime, such changes may be hard to detect and their effects on individual species may be hard to predict. But the lesson is clear enough. For example, although many countries have had plans to grow many tropical forests, they are highly susceptible to destruction because the soils in which they grow are poor in available nutrients. Centuries may be required to bring back a forest that was cut down or burnt out in the space of a few years. Many of the world's severely threatened animals and plants live in such forests, and it is certain that huge numbers of them will disappear if present rates of forest loss continue. Habitats in the world are unchangeable and fixedly exist.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

Living things include both the visible world of animals, plants, and fungi as well as the invisible world of bacteria and viruses. On a basic level, we can say that life is ordered. Organisms have an enormously complex organization. We're all familiar with the intricate systems of the basic unit of life, the cell. Life can also "work." Living creatures can take in energy from the environment. This energy, in the form of food, is transformed to maintain metabolic processes and for survival. Life grows and develops. This means more than just replicating or getting larger in size. Living organisms also have the ability to rebuild and repair themselves when injured. Life can reproduce. Think about the last time you accidentally stubbed your toe. Almost instantly, you moved back in pain. Finally, life can adapt and respond to the demands placed on it by the environment. There are three basic types of adaptations that can occur in higher organisms.

Reversible changes occur as a response to changes in the environment. Let's say you live near sea level and you travel to a mountainous area. You may begin to experience difficulty breathing and an increase in heart rate as a result of the change in altitude. These symptoms go away when you go back down to sea level. Body-related changes occur as a result of prolonged changes in the environment. Using there previous example, if you were to stay in the mountainous area for a long time, you would notice that your heart rate would begin to slow down and you would begin to breath normally. These changes are also reversible. Genotypic changes (caused by genetic mutation) take place within the genetic makeup of the organism and are not reversible. An example would be the development of resistance to pesticides by insects and spiders.

What does the word “reversible” in the passage mean?

A. Changeable

B. Visible 

C. Fitful 

D. Irregular

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

Living things include both the visible world of animals, plants, and fungi as well as the invisible world of bacteria and viruses. On a basic level, we can say that life is ordered. Organisms have an enormously complex organization. We're all familiar with the intricate systems of the basic unit of life, the cell. Life can also "work." Living creatures can take in energy from the environment. This energy, in the form of food, is transformed to maintain metabolic processes and for survival. Life grows and develops. This means more than just replicating or getting larger in size. Living organisms also have the ability to rebuild and repair themselves when injured. Life can reproduce. Think about the last time you accidentally stubbed your toe. Almost instantly, you moved back in pain. Finally, life can adapt and respond to the demands placed on it by the environment. There are three basic types of adaptations that can occur in higher organisms.

Reversible changes occur as a response to changes in the environment. Let's say you live near sea level and you travel to a mountainous area. You may begin to experience difficulty breathing and an increase in heart rate as a result of the change in altitude. These symptoms go away when you go back down to sea level. Body-related changes occur as a result of prolonged changes in the environment. Using there previous example, if you were to stay in the mountainous area for a long time, you would notice that your heart rate would begin to slow down and you would begin to breath normally. These changes are also reversible. Genotypic changes (caused by genetic mutation) take place within the genetic makeup of the organism and are not reversible. An example would be the development of resistance to pesticides by insects and spiders.

What does the word “reversible” in the passage mean?

A. Changeable

B. Visible 

C. Fitful 

D. Irregular

II. Read the text and answer the questions.

Teenagers today are undergoing lots of changes. They are between the ages of 13 to 19. Many of them are undergoing physical and emotional changes. These are the stages in the teenagers that are unavoidable.

The teenage life is full of happiness, sadness, enjoyment and it can be interesting too. This is because in the teenage life that a teenager is subjected to physical growth, hormonal changes and even dilemmas. They may be in a stage of conflict like undergoing puppy love. This is only a normal part of life.

Making friends is part and parcel of a teenager's life. The teenager should enjoy life by making friends with peers and participate in healthy activities such as camping, picnic, kayaking, swimming and so on. Through friends, a teenager learns to joke, laugh and play to release stress and tension. By making friends, the teenager learns to sweeten his or her joys and even eases the bitterness of life's downtime.

Many teenagers are very conscious of their physical outlook. It is at this part of their life that beauty strikes as the main self-image. They love to follow up with the latest trends for dressing, hairstyle and even look good with their physical image. Some girls and boys go on a crash diet to slim down in order to look attractive. Others may suffer from acne and pimples that may scar their external beauty.

Another stage in a teenager is the teenager's love life. There are chemical changes in the body and so the teenager tends to have a sense of feelings for the opposite sex. They will experience love and rejection. These sometimes will affect their studies.

Parents tend to play a role in a teenager's life. Parents today are overly concern over their children's well-being. They like to control their freedom and have a say what the teenagers do. Hence, we have cases of disagreements, disputes, quarrels and even runaways from homes among some teenage girls.

There are also negative problems that may pop out during a teenage life. A teenager is not well guided may fall into the wrong path. Some teenagers are involved in drugs trafflicking, smoking, drinking and smuggling of illegal products into the country. Others tend to vent their anger by vandalizing public property. We have those with no regard and respect for the elders.

The mass media has an influence over the lives of many teenagers. Violent action movies, obscene shows and pornography surfed from the Internet can bring a disastrous effect on a teenager's life. There will be more harm than good if nothing is done.

1.         From paragraph 1

(a) What is the age range of a teenager?

(b) What are the changes that a teenager undergoes?

2.         From paragraph 2

(a) Why is it that a teenage life is full of ups and downs?

(b) What kind of conflict does a teenage face?

3.         From paragraph 3

            List activities that a teenager can get involved in.

4.         From paragraph 4

            What are the things that a teenager likes to keep up to date with?

5.         From paragraph 8

            State why parents are worried about their teenagers. Answer in your own words.

II. Read the text and answer the questions.

Teenagers today are undergoing lots of changes. They are between the ages of 13 to 19. Many of them are undergoing physical and emotional changes. These are the stages in the teenagers that are unavoidable.

The teenage life is full of happiness, sadness, enjoyment and it can be interesting too. This is because in the teenage life that a teenager is subjected to physical growth, hormonal changes and even dilemmas. They may be in a stage of conflict like undergoing puppy love. This is only a normal part of life.

Making friends is part and parcel of a teenager's life. The teenager should enjoy life by making friends with peers and participate in healthy activities such as camping, picnic, kayaking, swimming and so on. Through friends, a teenager learns to joke, laugh and play to release stress and tension. By making friends, the teenager learns to sweeten his or her joys and even eases the bitterness of life's downtime.

Many teenagers are very conscious of their physical outlook. It is at this part of their life that beauty strikes as the main self-image. They love to follow up with the latest trends for dressing, hairstyle and even look good with their physical image. Some girls and boys go on a crash diet to slim down in order to look attractive. Others may suffer from acne and pimples that may scar their external beauty.

Another stage in a teenager is the teenager's love life. There are chemical changes in the body and so the teenager tends to have a sense of feelings for the opposite sex. They will experience love and rejection. These sometimes will affect their studies.

Parents tend to play a role in a teenager's life. Parents today are overly concern over their children's well-being. They like to control their freedom and have a say what the teenagers do. Hence, we have cases of disagreements, disputes, quarrels and even runaways from homes among some teenage girls.

There are also negative problems that may pop out during a teenage life. A teenager is not well guided may fall into the wrong path. Some teenagers are involved in drugs trafflicking, smoking, drinking and smuggling of illegal products into the country. Others tend to vent their anger by vandalizing public property. We have those with no regard and respect for the elders.

The mass media has an influence over the lives of many teenagers. Violent action movies, obscene shows and pornography surfed from the Internet can bring a disastrous effect on a teenager's life. There will be more harm than good if nothing is done.

1.         From paragraph 1

(a) What is the age range of a teenager?

(b) What are the changes that a teenager undergoes?

2.         From paragraph 2

(a) Why is it that a teenage life is full of ups and downs?

(b) What kind of conflict does a teenage face?

3.         From paragraph 3

            List activities that a teenager can get involved in.

4.         From paragraph 4

            What are the things that a teenager likes to keep up to date with?

5.         From paragraph 8

            State why parents are worried about their teenagers. Answer in your own words.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

Living things include both the visible world of animals, plants, and fungi as well as the invisible world of bacteria and viruses. On a basic level, we can say that life is ordered. Organisms have an enormously complex organization. We're all familiar with the intricate systems of the basic unit of life, the cell. Life can also "work." Living creatures can take in energy from the environment. This energy, in the form of food, is transformed to maintain metabolic processes and for survival. Life grows and develops. This means more than just replicating or getting larger in size. Living organisms also have the ability to rebuild and repair themselves when injured. Life can reproduce. Think about the last time you accidentally stubbed your toe. Almost instantly, you moved back in pain. Finally, life can adapt and respond to the demands placed on it by the environment. There are three basic types of adaptations that can occur in higher organisms.

Reversible changes occur as a response to changes in the environment. Let's say you live near sea level and you travel to a mountainous area. You may begin to experience difficulty breathing and an increase in heart rate as a result of the change in altitude. These symptoms go away when you go back down to sea level. Body-related changes occur as a result of prolonged changes in the environment. Using there previous example, if you were to stay in the mountainous area for a long time, you would notice that your heart rate would begin to slow down and you would begin to breath normally. These changes are also reversible. Genotypic changes (caused by genetic mutation) take place within the genetic makeup of the organism and are not reversible. An example would be the development of resistance to pesticides by insects and spiders.

Which of the following is NOT a feature of life?

A. Getting a job 

B. Giving birth

C. Getting larger and left- repairing 

D. Reacting to the environment

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

Living things include both the visible world of animals, plants, and fungi as well as the invisible world of bacteria and viruses. On a basic level, we can say that life is ordered. Organisms have an enormously complex organization. We're all familiar with the intricate systems of the basic unit of life, the cell. Life can also "work." Living creatures can take in energy from the environment. This energy, in the form of food, is transformed to maintain metabolic processes and for survival. Life grows and develops. This means more than just replicating or getting larger in size. Living organisms also have the ability to rebuild and repair themselves when injured. Life can reproduce. Think about the last time you accidentally stubbed your toe. Almost instantly, you moved back in pain. Finally, life can adapt and respond to the demands placed on it by the environment. There are three basic types of adaptations that can occur in higher organisms.

Reversible changes occur as a response to changes in the environment. Let's say you live near sea level and you travel to a mountainous area. You may begin to experience difficulty breathing and an increase in heart rate as a result of the change in altitude. These symptoms go away when you go back down to sea level. Body-related changes occur as a result of prolonged changes in the environment. Using there previous example, if you were to stay in the mountainous area for a long time, you would notice that your heart rate would begin to slow down and you would begin to breath normally. These changes are also reversible. Genotypic changes (caused by genetic mutation) take place within the genetic makeup of the organism and are not reversible. An example would be the development of resistance to pesticides by insects and spiders.

Which of the following is NOT a feature of life?

A. Getting a job

B. Giving birth

C. Getting larger and left- repairing

D. Reacting to the environment

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

Living things include both the visible world of animals, plants, and fungi as well as the invisible world of bacteria and viruses. On a basic level, we can say that life is ordered. Organisms have an enormously complex organization. We're all familiar with the intricate systems of the basic unit of life, the cell. Life can also "work." Living creatures can take in energy from the environment. This energy, in the form of food, is transformed to maintain metabolic processes and for survival. Life grows and develops. This means more than just replicating or getting larger in size. Living organisms also have the ability to rebuild and repair themselves when injured. Life can reproduce. Think about the last time you accidentally stubbed your toe. Almost instantly, you moved back in pain. Finally, life can adapt and respond to the demands placed on it by the environment. There are three basic types of adaptations that can occur in higher organisms.

Reversible changes occur as a response to changes in the environment. Let's say you live near sea level and you travel to a mountainous area. You may begin to experience difficulty breathing and an increase in heart rate as a result of the change in altitude. These symptoms go away when you go back down to sea level. Body-related changes occur as a result of prolonged changes in the environment. Using there previous example, if you were to stay in the mountainous area for a long time, you would notice that your heart rate would begin to slow down and you would begin to breath normally. These changes are also reversible. Genotypic changes (caused by genetic mutation) take place within the genetic makeup of the organism and are not reversible. An example would be the development of resistance to pesticides by insects and spiders.

In what way is life organized?

A. Hard 

B. Difficult 

C. Complicated 

D. Problematic

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

Living things include both the visible world of animals, plants, and fungi as well as the invisible world of bacteria and viruses. On a basic level, we can say that life is ordered. Organisms have an enormously complex organization. We're all familiar with the intricate systems of the basic unit of life, the cell. Life can also "work." Living creatures can take in energy from the environment. This energy, in the form of food, is transformed to maintain metabolic processes and for survival. Life grows and develops. This means more than just replicating or getting larger in size. Living organisms also have the ability to rebuild and repair themselves when injured. Life can reproduce. Think about the last time you accidentally stubbed your toe. Almost instantly, you moved back in pain. Finally, life can adapt and respond to the demands placed on it by the environment. There are three basic types of adaptations that can occur in higher organisms.

Reversible changes occur as a response to changes in the environment. Let's say you live near sea level and you travel to a mountainous area. You may begin to experience difficulty breathing and an increase in heart rate as a result of the change in altitude. These symptoms go away when you go back down to sea level. Body-related changes occur as a result of prolonged changes in the environment. Using there previous example, if you were to stay in the mountainous area for a long time, you would notice that your heart rate would begin to slow down and you would begin to breath normally. These changes are also reversible. Genotypic changes (caused by genetic mutation) take place within the genetic makeup of the organism and are not reversible. An example would be the development of resistance to pesticides by insects and spiders.

In what way is life organized?

A. Hard 

B. Difficult 

C. Complicated 

D. Problematic

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

Living things include both the visible world of animals, plants, and fungi as well as the invisible world of bacteria and viruses. On a basic level, we can say that life is ordered. Organisms have an enormously complex organization. We're all familiar with the intricate systems of the basic unit of life, the cell. Life can also "work." Living creatures can take in energy from the environment. This energy, in the form of food, is transformed to maintain metabolic processes and for survival. Life grows and develops. This means more than just replicating or getting larger in size. Living organisms also have the ability to rebuild and repair themselves when injured. Life can reproduce. Think about the last time you accidentally stubbed your toe. Almost instantly, you moved back in pain. Finally, life can adapt and respond to the demands placed on it by the environment. There are three basic types of adaptations that can occur in higher organisms.

Reversible changes occur as a response to changes in the environment. Let's say you live near sea level and you travel to a mountainous area. You may begin to experience difficulty breathing and an increase in heart rate as a result of the change in altitude. These symptoms go away when you go back down to sea level. Body-related changes occur as a result of prolonged changes in the environment. Using there previous example, if you were to stay in the mountainous area for a long time, you would notice that your heart rate would begin to slow down and you would begin to breath normally. These changes are also reversible. Genotypic changes (caused by genetic mutation) take place within the genetic makeup of the organism and are not reversible. An example would be the development of resistance to pesticides by insects and spiders.

Which type of adaption is permanent?

A. Body-related

B. Reversible

C. Genotypic

D. Environmental