Class 12 English Unit 12 Animal World Complete Guide (NEB New Syllabus) | Notes, Exercise Solutions & Summary | Language Development
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Welcome to your premier destination for the Class 12 English Unit 12 Animal World academic syllabus. This complete online textbook companion offers fully resolved answers to all end-of-chapter questions and writing tasks.

Through this comprehensive resource on Class 12 English Unit 12 Animal World, you will explore biological terms, the fascinating concept of coexistence through marine life, essays on independence versus interdependence, and learn grammar rules focusing on active and passive structures.

To acquire more scientific context on the biological elements described in this unit, you can explore the basics of marine biology and symbiosis online.

Access our general index for additional chapters here: Class 12 English Notes.

Class 12 English Unit 12 Animal World study notes

1. Class 12 English Unit 12 Animal World: Working with Words

A. Find the words from the text which have the following meanings.
a. Persons who are related to you and who live after you, such as your child or grandchild, are called descendants.
b. Twirl means to turn or spin around and around quickly.
c. Glycoproteins are proteins which contain oligosaccharide chains (glycans) attached to amino acid side-chains.
d. Lectins are carbohydrate-binding proteins that are highly specific for sugar groups that are part of other molecules and so cause agglutination of particular cells.
e. Polyps are abnormal tissue growths that most often look like small, flat bumps or tiny mushroom-like stalks found in the phylum Cnidaria and the medusa.
f. Predation is a biological interaction where one organism, the predator, kills and eats another organism, its prey.
g. Anemone is a genus of flowering plants in the buttercup family (often referencing sea anemones in marine environments).
h. A/An finicky person is extremely or excessively particular, exacting, or meticulous in taste or standards.
i. Nudibranch is a group of soft-bodied, marine gastropod molluscs which shed their shells after their larval stage.
j. A medusa is a free-swimming sexual form of a coelenterate such as a jellyfish, typically having an umbrella-shaped body with stinging tentacles around the edge.

B. Look up a dictionary and write the meanings of the following words then use them in your own sentences.
Arthropod
Meaning: An invertebrate animal of the large phylum Arthropoda, such as an insect, spider, or crustacean.
Sentence: Many arthropod animals undergo unique physiological changes that smooth their integration into varied ecosystems.
Gastropod
Meaning: A mollusc of the large class Gastropoda, such as a snail, slug, or whelk.
Sentence: The evolutionary problem of the structural causes of the torsion of the Gastropod body has been much discussed by marine biologists.
Biomass
Meaning: The total quantity or weight of organisms in a given area or volume.
Sentence: Energy derived from biomass represents a growing, sustainable source of renewable energy worldwide.
Calcification
Meaning: The hardening of tissue or other material by the deposition of insoluble calcium compounds.
Sentence: The soft extremities of cartilage in certain older marine organisms frequently undergo calcification.
Metamorphosis
Meaning: The biological process of transformation from an immature form to an adult form in two or more distinct stages.
Sentence: A beautiful butterfly is produced by complete metamorphosis from a crawling caterpillar.
Sturgeon
Meaning: A very large, primitive, scale-less fish with bony plates on the body, valued as a source of caviar.
Sentence: Real caviar is high-quality sturgeon roe prepared through a special salt-curing process.

2. Class 12 English Unit 12 Animal World: Comprehension Solutions

Answer the following questions based on the text.
a. What are the indicators of the fact that we are very self-conscious about ourselves these days?
The primary indicators of the fact that we are extremely self-conscious about ourselves these days are our modern obsessions with self-realization, self-help books, personal self-development, psychological self-awareness, self-respect, and spiritual self-enlightenment.
b. How have we celebrated the fact that we have our individual identity?
We have celebrated the fact that we have our unique individual identity by providing ourselves with a distinct personal name, separating ourselves linguistically and socially from the collective group.
c. Are we, human beings, really unique? Why/Why not?
No, we human beings are not truly unique in the grand scheme of nature. This is because uniqueness is actually so commonplace and universal a property among all living things that there is really nothing at all unique about possessing it. A phenomenon cannot logically be unique and universal at the same time.
d. How do fish recognize each other?
Fish recognize each other primarily by their highly sensitive, individualized sense of smell.
e. What is the function of individuality?
The primary biological function of individuality is to serve self-preservation and maintain the distinct boundaries of an organism’s own self against the surrounding environment.
f. What does the mix-up of two selves tell us about our identity?
The biological mix-up of two distinct selves tells us that absolute division in nature is an illusion, and that cooperation, structural unity, and association with each other are fundamentally required for mutual survival and continued existence.
g. What does the author illustrate with the tale of the nudibranch and the medusa?
The author illustrates the profound ecological value of co-existence, cooperation, mutual helpfulness, biological collaboration, and symbiotic togetherness through the tale of the nudibranch and the medusa. It highlights the significance of friendship and deep mutual dependence on each other for basic survival.
h. Why is the author disturbed by the thought of the creatures like the nudibranch and medusa?
The author is disturbed by the thought of creatures like the nudibranch and medusa because their symbiotic lifecycle provides him with an odd, unsettling feeling, confusing his rational mind with a vague, bizarre concept that feels more like a dream than logical biology.
i. What does the writer mean by “they remind me of the whole earth at once?”
By saying “they remind me of the whole earth at once,” the writer means that it is incredibly complicated and beautiful to justify the deep, interconnected relationship between living creatures and non-living things in our biosphere. The more one tries to view them in isolation, the more one realizes they are connected, leading to confusion if we try to analyze them through a lens of strict independence.

3. Class 12 English Unit 12 Animal World: Critical Thinking Analysis

a. How does the author make satire on the modern idea of the ‘self’ based on individuality, independence and uniqueness?

The author in this essay brilliantly satirizes the modern human obsession with the ‘self’ based on individuality, independence, and uniqueness. The essay explores what human beings can learn about the self by observing nature closely. In the opening, the writer draws attention to our modern social trends of constantly promoting self-help, individual development, and the pride of being completely independent of others.

To counter this human arrogance, the author introduces the close, bizarre symbiotic relationship between the nudibranch and the medusa living in the Bay of Naples. A mature jellyfish engulfs a tiny, newly-hatched slug, only to be slowly devoured bit by bit until the snail completely dominates, and the jellyfish is reduced to a round, “successfully edited parasite” attached to the skin near the snail’s mouth. Eventually, the tentacles are consumed, and the jellyfish is reduced in substance while the snail grows in size. Yet, they cannot live any other way; they depend entirely on each other for survival.

The author illustrates the value of co-existence, cooperation, and biological togetherness with this tale. No organism is a self-sufficient island; all life is deeply interconnected, much like the relationship between anemones and crabs. Through these biological examples, the author satirizes the modern human concept of absolute independence, showing that pride over individuality and uniqueness is fundamentally unaligned with the cooperative, interdependent reality of nature.

4. Class 12 English Unit 12 Animal World: Writing Tasks & Essays

A. Write an essay on “Independence vs. Interdependence” in about 250 words.

Independence vs. Interdependence

Human beings usually categorize themselves into individual or group entities. These self-conceptions emanate in our minds and determine our social motivation and behaviors. There are two primary perceptions that people have about themselves regarding their relationship with others: the independent self-concept, where an individual views their existence as separate from others, and the interdependent self-concept, where a person feels deeply affiliated and connected to their community. Exploring these concepts reveals the profound advantages of interdependence over absolute independence.

Unlike the independent-self, which focuses on individual responsibility separate from the collective, the interdependent self-concept emphasizes shared responsibilities and mutual reliance. The core tenet of interdependence is that individuals in a society rely on one another for survival, emotional stability, and mutual progress. Interdependence instills the comforting idea that people are not isolated in their personal struggles; instead, they provide a network of support for social, emotional, and economic growth, encouraging diverse roles that contribute to the development of the community.

Furthermore, an interdependent self-concept is crucial for overcoming existential fear and insecurity. While absolute independence can pit an individual against the rest of society, interdependence promotes social cohesion, helping individuals experience lower levels of anxiety. The recognition that we have the support of a family or community is essential for mitigating the negative feelings of isolation. While we need a healthy balance of both independent agency and interdependent support, understanding our mutual reliance remains the key to a harmonious, functional civilization.


B. Write a newspaper article highlighting the increasing individualism in the modern Nepali society.

Increasing Individualism in the Modern Nepali Society

By Ramesh Thapa
March 12, 2019

Individualism is a social outlook and ideology that emphasizes the intrinsic worth, self-reliance, and personal independence of the individual. Individualists advocate that the goals and desires of an individual should take precedence over collective social groups or state control, opposing external interference. Today, this philosophy is spreading rapidly in modern Nepalese society, transforming traditional family and community dynamics.

Historically, Nepali culture was deeply collectivistic, rooted in joint family systems, cooperative farming (Parma), and shared neighborhood celebrations. However, rapid urbanization, higher incomes, modern education, and a shift toward white-collar job markets have led to a visible rise in individualism. Younger generations are increasingly prioritizing personal career paths and nuclear family setups over the expectations of extended kinships, a shift that is especially prominent in urban centers like Kathmandu.

While rising economic prosperity and education are highly welcome changes, the individualism that follows is often conflated with selfishness. Collectivism emphasizes close social ties and an interconnected view of the self, whereas modern individualism can sometimes lead to social isolation and the neglect of elderly citizens. As Nepali society continues to modernize, our challenge is to navigate this transition carefully—retaining the personal freedoms of individualism while preserving the invaluable cooperative spirit of our traditional community life.

5. Class 12 English Unit 12 Animal World: Grammar (Passive Voice)

A. Make passive sentences from the following information as in the example.
a. volleyball/every/country/play
Volleyball is played in every country.
b. spaghetti/boiling water/cook
Spaghetti is cooked in boiling water.
c. each lesson/an exercise/follow
Each lesson is followed by an exercise.
d. taxes/the price/include
Taxes are included in the price.
e. extensive information/the internet/find
Extensive information is found on the internet.
f. our order/the waiter/took
Our order was taken by the waiter.
g. the schedule/the participants/will distribute
The schedule will be distributed by the participants.
h. the police/footprint/found
Footprints were found by the police.
i. the children/the sandcastles/built
The sandcastles were built by the children.
j. the father/the window/not going to open
The window is not going to be opened by the father.

B. Rewrite the following sentences in the passive voice using the correct form of verbs in the brackets.
a. Call the ambulance! Two boys have been injured (injure) in a motorbike accident.
b. The clock has been used (use) since the 17th century.
c. I had to wait outside the classroom while the classroom was being cleaned (clean).
d. The problem is being discussed (discuss) by the subject specialists at the moment.
e. By the time I came back, the task had been finished (finish).
f. Women are said (say) to be happier than men.
g. Look! The house has been destroyed (destroy) by the fire.
h. The other three reports will be submitted (submit) by next month.
i. Many people have been rescued (rescue) from the floods by the security persons this year.
j. The state of Florida was hit (hit) by a hurricane that did serious damage.

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