CUET UG Biology Booster Test 2-Foundations of Ecology -

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CUET UG Biology Booster Test 2-Foundations of Ecology

⏱️ 30 Minutes

❓ 20 Questions

📌 Answers are locked once submitted — results and explanations appear at the end.

CUET UG Biology Booster Test 2-Foundations of Ecology

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QUESTION 1 OF 20

Consider the following statements regarding the presentation of biological content:
I. Biology is often presented as botany, zoology, and microbiology.
II. Modern biology is a euphemism for classical aspects of biology.
III. Ecology gives a holistic perspective that weaves different areas of biological information together. Which of the statements are true?

Answer Review

1 Consider the following statements regarding the presentation of biological content:
I. Biology is often presented as botany, zoology, and microbiology.
II. Modern biology is a euphemism for classical aspects of biology.
III. Ecology gives a holistic perspective that weaves different areas of biological information together. Which of the statements are true?

A I and II

B I and III

C II and III

D I, II, and III

💡 Short Explanation

Biology is traditionally compartmentalized into Botany, Zoology, and Microbiology. Ecology is explicitly defined as the holistic thread connecting these fields. Modern biology is an extension, not a euphemism for classical biology.

✅ Correct Answer Explanation

Statement I is correct as biology has been historically divided into these sub-disciplines. Statement III is correct because ecology acts as a unifying principle. Statement II is incorrect; "modern biology" usually refers to molecular/genetic advancements rather than being a "euphemism" for classical biology.

❓ Why Other Options Are Incorrect

Option A → Incorrect because Statement II is false.
Option C → Incorrect because Statement I is true and Statement II is false.
Option D → Incorrect because Statement II is false.

🎯 Strategy

Used: Elimination

Application: Validate each statement individually; once Statement II is identified as false, eliminate all options containing II.

Final Logic: I and III are correct descriptions of biological pedagogy and ecological function.

🧠 Memory Trick

"I & III are Key: Classify and Unify."

📚 Organisms and Populations – Topic: Ecology and its definitions

2 Match the following examples to their correct level of biological organization based on the text's principles:

Column 1	Column 2
1. Voice box	a. Population
2. Singing bulbul	b. Individual organism
3. Teakwood trees in a forest tract	c. Ecosystem
4. Wetland	d. Organ

A 1-a, 2-b, 3-d, 4-c

B 1-d, 2-b, 3-a, 4-c

C 1-d, 2-a, 3-b, 4-c

D 1-b, 2-d, 3-a, 4-c

💡 Short Explanation

Voice box = Organ. Singing bulbul = Individual organism. Teakwood trees in a forest tract = Population. Wetland = Ecosystem.

✅ Correct Answer Explanation

The voice box (syrinx) is an organ within a bird and therefore belongs to the organ level of organization. A singing bulbul represents an individual organism. Teakwood trees of the same species occupying a forest tract constitute a population. A wetland includes living organisms and their physical environment interacting together, making it an ecosystem. Therefore, the correct matching is 1-d, 2-b, 3-a, 4-c (Option B).

❓ Why Other Options Are Incorrect

Option A: Incorrectly matches the voice box with Population and teakwood trees with Organ.
Option C: Incorrectly matches the singing bulbul with Population and teakwood trees with Individual organism.
Option D: Incorrectly reverses the levels of Organ and Individual organism.

🎯 Strategy

Used

Substitution

Application: Identify the biological organization level represented by each example and match it with the corresponding term.

Final Logic:

Voice box → Organ → d
Singing bulbul → Individual organism → b
Teakwood trees in a forest tract → Population → a
Wetland → Ecosystem → c
Therefore, the correct answer is Option B (1-d, 2-b, 3-a, 4-c).

🧠 Memory Trick

"Organ → Individual → Population → Ecosystem"

📚 Class XII – Biology – Chapter: Organisms and Populations – Topic: Levels of biological organization

3 If a researcher is studying the vibrating bone in a bird to understand its vocalizations, they are primarily trying to answer a:

A Why-type question seeking evolutionary significance

B How-type question seeking the mechanism behind the process

C Socio-political question regarding habitat

D Holistic question about population genetics

💡 Short Explanation

'How' questions investigate the physical 'machinery'. The vibrating bone (syrinx) is the mechanism. Studying the structure reveals how it produces sound.

✅ Correct Answer Explanation

A 'how-type' question focuses on the mechanical and physiological operations that enable a biological function. Studying a physical structure like a bone or organ to see how it operates to produce sound is a classic mechanical (How) investigation.

❓ Why Other Options Are Incorrect

Option A → 'Why' would focus on the purpose of the song (mating, territory), not the physical bone.
Option C → Socio-political issues do not involve bird anatomy.
Option D → Population genetics involves gene frequencies, not individual bird anatomy.

🎯 Strategy

Used: Contextual/Tonal Matching

Application: Identify the nature of the study (structure/process).

Final Logic: Structural investigation of a process equals "How/Mechanism."

🧠 Memory Trick

"Structure study = How/Mechanism."

📚 Organisms and Populations – Topic: Ecology and its definitions

4 Concluding that a bird sings because of its "need to communicate with its mate during breeding season" directly answers a question about the process's:

A Significance

B Mechanism

C Physical anatomy

D Anthropogenic impact

💡 Short Explanation

'Need to communicate' refers to function and purpose. Purpose = Adaptive significance. 'Why' questions focus on this significance.

✅ Correct Answer Explanation

Questions regarding the 'why'—the ultimate reason or evolutionary benefit—address the significance of the process. In this case, communication during breeding is an adaptive behavior that ensures reproductive success, which is the functional significance of the song.

❓ Why Other Options Are Incorrect

Option B → Mechanism would explain how the vocal cords vibrate.
Option C → Anatomy is the physical structure involved.
Option D → Anthropogenic impact refers to human-caused environmental changes.

🎯 Strategy

Used: Substitution

Application: Replace the concluding reason with "Adaptive Purpose."

Final Logic: Purpose = Significance.

🧠 Memory Trick

"Need = Why/Significance."

📚 Organisms and Populations – Topic: Ecology and its definitions

5 Which of the following honours/awards was NOT received by Ramdeo Misra according to the text?

A Fellowship of the Indian National Science Academy

B Fellowship of the World Academy of Arts and Science

C Nobel Prize in Ecology

D Sanjay Gandhi Award in Environment and Ecology

💡 Short Explanation

The text lists specific fellowships and the Sanjay Gandhi Award. There is no "Nobel Prize in Ecology." Ramdeo Misra was a pioneering Indian scientist, not a Nobel laureate.

✅ Correct Answer Explanation

The passage explicitly mentions his fellowships (INSA, WAAS) and the Sanjay Gandhi Award. Since there is no Nobel Prize awarded in the field of Ecology, this is clearly the incorrect attribution.

❓ Why Other Options Are Incorrect

Options A, B, and D → These are explicitly listed in the passage as honors received by Misra.

🎯 Strategy

Used: Elimination

Application: Cross-reference the passage to confirm the listed awards.

Final Logic: The Nobel prize is not listed in the provided text (nor does it exist for Ecology).

🧠 Memory Trick

"Nobel is not in the text."

📚 Organisms and Populations – Topic: Ecology in India

6 Arrange the academic progression of Indian Ecology in the correct chronological order as driven by Ramdeo Misra:
1. Over 50 scholars obtained Ph.D. degrees under his supervision.
2. He obtained his Ph.D. under Prof. W. H. Pearsall in the UK.
3. Ecology teaching and research were initiated across the country by his scholars.
4. He formulated the first postgraduate course in ecology in India.

A 4, 1, 3, 2

B 2, 1, 4, 3

C 4, 2, 1, 3

D 2, 4, 1, 3

💡 Short Explanation

2 (PhD in UK, 1937) is the start. 4 (Course formulation) followed at BHU. 1 (Mentoring students) allowed for 3 (Nationwide spread).

✅ Correct Answer Explanation

Misra's timeline: First, he gained his credentials (PhD, 1937). Then, he established the academic framework (PG course at BHU). Subsequently, he trained a cohort (50+ PhDs), who then dispersed to start research programs nationwide.

❓ Why Other Options Are Incorrect

Options B, C, and D → These place the start of the course (4) before his training (2) or the nationwide spread (3) before the cohort training (1), which is logically impossible.

🎯 Strategy

Used: Substitution

Application: Arrange chronologically based on a career path (Education → Academic Start → Training → Dissemination).

Final Logic: The logical progression of an academic career path confirms 2, 4, 1, 3.

🧠 Memory Trick

"Get PhD -> Teach -> Train -> Spread."

📚 Organisms and Populations – Topic: Ecology in India

📄 Passage

"He was honoured with the Fellowships of the Indian National Science Academy and World Academy of Arts and Science, and the prestigious Sanjay Gandhi Award in Environment and Ecology. Due to his efforts, the Government of India established the National Committee for Environmental Planning and Coordination (1972) which, in later years, paved the way for the establishment of the Ministry of Environment and Forests (1984)."

Based on the passage, the establishment of the National Committee for Environmental Planning and Coordination (1972) was a direct result of the efforts of:

A Prof. W. H. Pearsall

B Ramdeo Misra

C The World Academy of Arts and Science

D Leeds University

💡 Short Explanation

The passage states "Due to his efforts, the Government of India established..." "His" refers to Ramdeo Misra.

✅ Correct Answer Explanation

The passage explicitly credits Ramdeo Misra's advocacy and efforts for the government's establishment of the National Committee for Environmental Planning and Coordination in 1972.

❓ Why Other Options Are Incorrect

Options A, C, and D → These entities are either his mentors or professional societies, not the individuals responsible for the lobbying for Indian government policy mentioned in the text.

🎯 Strategy

Used: Contextual/Tonal Matching

Application: Locate "Due to his efforts" in the passage and link to the subject.

Final Logic: The subject of the paragraph is Ramdeo Misra.

🧠 Memory Trick

"Efforts = Misra."

📚 Organisms and Populations – Topic: Ecology in India

📄 Passage

According to the passage, the entity that paved the way for the establishment of the Ministry of Environment and Forests (1984) was:

A The Indian National Science Academy

B The National Committee for Environmental Planning and Coordination

C Banaras Hindu University

D The Department of Botany

💡 Short Explanation

The passage says the Committee "paved the way for the establishment of the Ministry." This transition occurred between 1972 and 1984.

✅ Correct Answer Explanation

The text clearly states that the National Committee for Environmental Planning and Coordination (1972) "paved the way" for the MoEF (1984).

❓ Why Other Options Are Incorrect

Options A, C, and D → These are associated with his academic career or fellowships, not the institutional predecessor to the ministry.

🎯 Strategy

Used: Contextual/Tonal Matching

Application: Find the phrase "paved the way" in the passage.

Final Logic: The Committee is explicitly identified as the precursor to the Ministry.

🧠 Memory Trick

"Committee paved the way."

📚 Organisms and Populations – Topic: Ecology in India

9 Ramdeo Misra's foundational research specifically targeted the understanding of environmental responses of:

A Animal populations in temperate regions

B Plant populations in tropical communities

C Microbial cultures in laboratories

D Avian populations in alpine regions

💡 Short Explanation

Misra was a professor at the Department of Botany (BHU). The passage highlights his work on "environmental responses of plant populations."

✅ Correct Answer Explanation

The passage notes: "His research laid the foundations for understanding... environmental responses of plant populations and productivity..." Given his role in the Department of Botany, this aligns with his focus on plant-based tropical ecology.

❓ Why Other Options Are Incorrect

Options A, C, and D → The text does not mention research on animals, microbes, or alpine birds.

🎯 Strategy

Used: Elimination

Application: Use the clue "Department of Botany" to identify the study subject (Plants).

Final Logic: Botanist + Tropical study = Plant populations in tropical communities.

🧠 Memory Trick

"Botany = Plant Populations."

📚 Organisms and Populations – Topic: Ecology in India

10 Which of the following ecosystems is NOT explicitly mentioned as a focus of Misra's research on productivity and nutrient cycling?

A Tropical forest ecosystems

B Grassland ecosystems

C Tundra ecosystems

D Tropical communities

💡 Short Explanation

The passage mentions: "tropical forest and grassland ecosystems." Tundra is not included. Tropical communities are mentioned as a broader category of his work.

✅ Correct Answer Explanation

The text identifies tropical forest ecosystems and grassland ecosystems as the primary focuses of his research on nutrient cycling. Tundra ecosystems are not cited in the provided text.

❓ Why Other Options Are Incorrect

Options A, B, and D → These are explicitly mentioned in the passage provided.

🎯 Strategy

Used: Elimination

Application: Check the list in the passage against the options.

Final Logic: Tundra is absent from the specific list provided in the text.

🧠 Memory Trick

"Tundra is a miss in the list."

📚 Organisms and Populations – Topic: Ecology in India

11 Asking "Why does cactus have so many thorns?" is an application of a scientific frame of mind that seeks to discover:

A The operational mechanism of thorn growth

B The exact date the cactus evolved

C The evolutionary significance and adaptive need of thorns

D The cellular composition of a thorn

💡 Short Explanation

'Why' questions look for the function or adaptation. Thorns are adaptive structures for defense and water conservation. The 'Why' relates to the evolutionary survival value.

✅ Correct Answer Explanation

In ecology, 'why-type' questions focus on the adaptive significance of a trait. Asking why a plant has thorns probes the evolutionary reason (e.g., protection from herbivores) rather than the mechanism of growth.

❓ Why Other Options Are Incorrect

Option A → 'How' would focus on the biological development of thorns.
Option B → The exact date is a historical/paleontological fact, not an ecological adaptation.
Option D → Cellular composition is a structural detail, not an evolutionary function.

🎯 Strategy

Used: Substitution

Application: Replace "Why" with "Purpose" and "How" with "Process."

Final Logic: 'Why' = Purpose (Evolutionary Significance).

🧠 Memory Trick

"Why = Purpose = Adaptive Need."

📚 Organisms and Populations – Topic: Ecology and its definitions

12 You need 4 items in List I and 4 corresponding items in List II. Here's the corrected version.
Question
Match the scientific observations with their likely ecological focus (Mechanism or Significance).

List I	List II
1. Identifying the vibrating bone in a bird	a. Mechanism
2. Determining how a bee locates nectar	b. Significance
3. Observing a chick recognizing its mother	c. Mechanism
4. Understanding the need for communication during breeding	d. Significance

A 1-a, 2-b, 3-c, 4-d

B 1-b, 2-a, 3-c, 4-d

C 1-a, 2-b, 3-d, 4-c

D 1-b, 2-a, 3-d, 4-c

💡 Short Explanation

Identifying the vibrating bone in a bird = Mechanism. Determining how a bee locates nectar = Mechanism. Observing a chick recognizing its mother = Mechanism. Understanding the need for communication = Significance.

✅ Correct Answer Explanation

The first three observations focus on structures, physiological processes, or behaviors and therefore relate to mechanisms. Identifying a vibrating bone concerns anatomy, locating nectar concerns behavioral processes, and recognizing the mother concerns behavioral or physiological mechanisms. In contrast, understanding the need for communication addresses the adaptive or evolutionary value of communication and therefore relates to significance. Thus, the correct matching is 1-b, 2-b, 3-b, 4-a (Option D).

❓ Why Other Options Are Incorrect

Option A: Incorrectly classifies observations 1 and 3 as Significance.
Option B: Incorrectly classifies observation 2 as Significance.
Option C: Incorrectly classifies observations 1 and 2 as Significance and observation 4 as Mechanism.

🎯 Strategy

Used

Contextual/Tonal Matching

Application: Classify each observation as either a physical/behavioral process (Mechanism) or an evolutionary/adaptive reason (Significance).

Final Logic:

Identifying the vibrating bone in a bird → Mechanism → b
Determining how a bee locates nectar → Mechanism → b
Observing a chick recognizing its mother → Mechanism → b
Understanding the need for communication → Significance → a
Therefore, the correct answer is Option D (1-b, 2-b, 3-b, 4-a).

🧠 Memory Trick

"How = Mechanism; Why = Significance."

📚 Class XII – Biology – Chapter: Organisms and Populations – Topic: Ecology and its definitions.

13 Which statement regarding the interactions with the abiotic environment is FALSE according to the text?

A Ecology studies interactions between the organism and its physical environment.

B The physical environment is referred to as abiotic.

C Populations never share or compete for similar abiotic resources.

D An individual organism has to cope with a changed environment.

💡 Short Explanation

Populations often compete for resources like water, light, and nutrients. Competition is a central theme in ecology. The statement "never share or compete" is biologically incorrect.

✅ Correct Answer Explanation

Ecology explicitly studies how organisms interact for limited resources (water, light, space). Claiming that populations "never" compete is the opposite of the fundamental ecological principle of competition and niche partitioning.

❓ Why Other Options Are Incorrect

Option A → Correct definition of ecology.
Option B → Correct definition of abiotic.
Option D → Individuals do indeed cope (adapt) to environmental shifts.

🎯 Strategy

Used: Extreme Word Filter

Application: The word "never" is an extreme qualifier that usually flags a statement as false in biology.

Final Logic: "Never" is rarely true in ecological interactions.

🧠 Memory Trick

"Competition is key; 'Never' is false."

📚 Organisms and Populations – Topic: Organism and its Environment

14 Consider the following statements about how organisms interact:
I. The essence of biological understanding is knowing how an organism remains an individual.
II. Organisms interact with other organisms and behave like organised wholes.
III. Ecosystems and biomes do not behave like organised wholes. Which of the statements is/are correct?

A I only

B I and II

C II and III

D I, II, and III

💡 Short Explanation

Individuals are cohesive units. Organisms interact in an organized manner. Ecosystems and biomes also exhibit organized structure/function, making statement III false.

✅ Correct Answer Explanation

Statement I is correct (individuals are the base unit). Statement II is correct (organisms interact to form groups). Statement III is incorrect because ecosystems and biomes are highly structured, organized entities with nutrient cycling and energy flows.

❓ Why Other Options Are Incorrect

Option A → Incomplete, ignores II.
Option C → Incorrect because III is false.
Option D → Incorrect because III is false.

🎯 Strategy

Used: Elimination

Application: Identify that ecosystems are "organized" (making III false), then eliminate options containing III.

Final Logic: Since III is false, B is the only possibility.

🧠 Memory Trick

"Organisms are organized; Ecosystems are too!"

📚 Organisms and Populations – Topic: Levels of biological organization

15 Which of the following is FALSE regarding the distinction between individual organisms and populations?

A An individual may have births and deaths.

B A population has birth rates and death rates.

C Natural selection operates strictly at the individual level to evolve desired traits.

D Population ecology links ecology to population genetics.

💡 Short Explanation

Individuals die/survive, but populations evolve. Selection happens on individuals, but evolution is a population-level phenomenon. The statement claims evolution happens at the individual level, which is false.

✅ Correct Answer Explanation

Natural selection acts on individuals (based on fitness), but the evolution of "desired traits" (population-level change) occurs in the population. Therefore, saying it operates "strictly at the individual level to evolve" is conceptually imprecise and false in the context of evolutionary theory.

❓ Why Other Options Are Incorrect

Option A → An individual life cycle includes birth and death.
Option B → Populations are defined by rates (births/deaths per capita).
Option D → Population ecology is the defined link between these fields.

🎯 Strategy

Used: Substitution

Application: Contrast the terms "selection" (on individuals) and "evolution" (of populations).

Final Logic: Individuals do not evolve; populations do.

🧠 Memory Trick

"Selection: Individuals; Evolution: Populations."

📚 Organisms and Populations – Topic: Population Ecology

16 Arrange the following entities to reflect the flow from a single biological unit to the broadest ecological level mentioned:
1. Biome
2. Organism
3. Community
4. Population

A 2, 3, 4, 1

B 4, 2, 3, 1

C 2, 4, 3, 1

D 3, 4, 2, 1

💡 Short Explanation

Hierarchy: Individual (2) → Population (4) → Community (3) → Biome (1). Complexity increases from organism to biome.

✅ Correct Answer Explanation

The correct ecological hierarchy is: Organism (Individual) < Population (Group of species) < Community (Multiple interacting populations) < Biome (Regional ecosystem). 2-4-3-1 is the only correct sequence.

❓ Why Other Options Are Incorrect

Options A, B, and D → These misplace the population, community, or individual, violating the principle of increasing hierarchy.

🎯 Strategy

Used: Option Grouping

Application: Visualize the pyramid of biological complexity.

Final Logic: Organism is the smallest, Biome is the largest.

🧠 Memory Trick

"Unit-Group-Interact-Large = Organism-Pop-Comm-Biome."

📚 Organisms and Populations – Topic: Levels of biological organization

17 The study of ecology involves taking a critical view of anthropogenic environmental degradation. What does "anthropogenic" imply in this context?

A Caused by human activities

B Caused by animal predation

C Caused by natural geological shifts

D Caused by solar radiation changes

💡 Short Explanation

"Anthro-" means human (Greek: anthropos). "-genic" means produced by. Anthropogenic = Human-caused.

✅ Correct Answer Explanation

The prefix "anthropo-" refers to humans. In scientific literature, "anthropogenic" specifically describes environmental changes or damage that result from human impact, such as pollution or habitat destruction.

❓ Why Other Options Are Incorrect

Option B → Animal predation is natural.
Option C → Geological shifts are natural, not anthropogenic.
Option D → Solar changes are extraterrestrial/natural.

🎯 Strategy

Used: Dimensional/Unit Analysis

Application: Root word analysis (Anthro = Human).

Final Logic: Anthropogenic means human-made.

🧠 Memory Trick

"Anthro = Human."

📚 Organisms and Populations – Topic: Environmental issues

18 The socio-political issues raised in the context of ecology are primarily a direct result of:

A The operation of the voice box in birds

B Anthropogenic environmental degradation

C The singing of the bulbul

D The establishment of botany departments

💡 Short Explanation

Environmental harm often leads to social disputes (e.g., resource scarcity). Degradation causes socio-political tension. Options A, C, and D are biological processes or institutions, not the cause of socio-political issues.

✅ Correct Answer Explanation

Socio-political issues in environmental science arise when human activity damages nature, leading to conflicts over resources, policy implementation, and human welfare. This is a direct consequence of anthropogenic environmental degradation.

❓ Why Other Options Are Incorrect

Options A and C → These are basic biological examples.

Option D → Academic institutions are neutral.

🎯 Strategy

Used: Substitution

Application: Match "Problem" (Socio-political issue) with "Cause" (Human impact).

Final Logic: Socio-political tensions are a consequence of environmental impact.

🧠 Memory Trick

"Degradation creates Conflict."

📚 Organisms and Populations – Topic: Environmental issues

19 While an individual organism copes with a changed environment, it is at the population level that natural selection operates. What is the ultimate outcome of this operation?

A Extinction of the biome

B Evolution of desired traits

C Immediate cellular mutation

D Complete isolation of the species

💡 Short Explanation

Natural selection filters traits. Over generations, advantageous (desired) traits become common. This is the definition of evolution by natural selection.

✅ Correct Answer Explanation

Natural selection increases the frequency of beneficial traits that allow an organism to survive and reproduce. Therefore, the "desired traits" (adaptations) accumulate in the population, leading to evolution.

❓ Why Other Options Are Incorrect

Option A → Biome extinction is a negative outcome, not the mechanism of selection.
Option C → Selection works on pre-existing variation, it doesn't cause immediate mutation.
Option D → Speciation is a different process (isolation).

🎯 Strategy

Used: Contextual/Tonal Matching

Application: Define the outcome of Natural Selection (Adaptation/Evolution).

Final Logic: Natural selection = Evolution of adaptive (desired) traits.

🧠 Memory Trick

"Selection = Desired Traits."

📚 Organisms and Populations – Topic: Population Ecology

20 Population ecology is highlighted as an important area in the text primarily because it establishes a vital link between:

A Ecology, population genetics, and evolution

B Molecular biology and classical botany

C Institutional planning and socio-political issues

D Ramdeo Misra's research and the MoEF

💡 Short Explanation

Population ecology studies frequency changes over time. This directly links to genetics and evolutionary theory. These are the three major pillars of population studies.

✅ Correct Answer Explanation

Population ecology is defined as the study of population dynamics and interaction with the environment, which is inherently tied to genetics (who survives to reproduce) and evolution (the long-term change in populations). This triad is central to biological science.

❓ Why Other Options Are Incorrect

Options B, C, and D → These connect unrelated fields (e.g., Botany, Institutional planning) that do not represent the biological synthesis of population ecology.

🎯 Strategy

Used: Option Grouping

Application: Choose the grouping that covers the core biological disciplines related to population.

Final Logic: Population ecology = Ecology + Genetics + Evolution.

🧠 Memory Trick

"Pop-Ecology = E.G.E (Ecology, Genetics, Evolution)."

📚 Organisms and Populations – Topic: Population Ecology

CUET UG Biology Booster Test 2-Foundations of Ecology

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