Biology Practice Test 2

Biology Practice Test 2 is designed to help students strengthen their understanding of key biological concepts, theories, and processes for competitive entry tests like MDCAT, NUMS, AKU, UET, ECAT, NTS, as well as FSC Board Exams. This test covers topics from molecular biology, cell division, human physiology, plant physiology, and more, helping students improve accuracy and retention.

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Biology Practice Test 2

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1 / 100

Category: Biology

Population growth is checked by which of the following?

NUMS Mock 3
Biology
Evolution

A) No competition

B) No polymorphism

C) Polymorphism

D) Competiton

2 / 100

Category: Biology Ch 3 Class 12

The spinal nerves are functionally:

NUMS 2016
Biology
Coordination and Control
Elimination Tool:

A) Sensory nerves

B) Motor nerves

C) Mixed nerves

D) Unknown

3 / 100

Category: Biology

Which one of the following is a fish?

NUMS Mock 3
Biology
Kingdom Animalia

A) Flying fish

B) Salmon

C) Sea horse

D) All of the above

4 / 100

Category: Biology

Q.49 Another name for the sex cell is:

A. Hormone

B. Gamete

C. Zygote

D. Testicle

5 / 100

Category: Biology Ch 1 Class 12

The condition of a stable internal environment in an organism is:

NTS 2015 SMBBMC
Biology
Homeostasis
Elimination Tool:

A) Coordination

B) Organisation

C) Homeostasis

D) Integration

6 / 100

Category: Biology

Which of the following diseases is sexually transmitted?

NUMS Mock 1
Biology
Bio-diversity | Variety of Life

A) Tuberculosis

B) AIDS

C) Dengue Fever

D) Cholera

7 / 100

Category: Biology Ch 8 Class 12

In which of the following cases, genotypic and phenotypic ratio will remain same in F2 generation

Law of independent assortment

Law of Segregation

Test cross

Incomplete dominance.

8 / 100

Category: Biology Ch 4 Class 11

Percentage of proteins in cell membrane is

20-40%

40-50%

60-80%

80-100%

9 / 100

Category: Biology

Q.66 Which of the following provides the strong evidence in support of evolution:

A. Fossil record

B. Comparative embryology

C. Comparative anatomy

D. Molecular biology

10 / 100

Category: Biology Ch 12 Class 11

Midgut in cockroach is a short narrow tube called

Hepatic caeca

Gizzard

Stomach

Rectum

11 / 100

Category: Biology Ch 10 Class 11

The maximum mammalian characters are present in ____

NUMS 2015
Biology
Kingdom Animalia
Elimination Tool:

A) Metatheria

B) Prototheria

D) None of the given options

C) Eutheria

12 / 100

Category: Biology Ch 14 Class 11

Which of the following has oxygenated blood?

NUMS 2014
Biology
Transport
Elimination Tool:

A) Renal veins

B) None

C) Pulmonary artery

D) Hepatic portal veins

13 / 100

Category: Biology Ch 3 Class 11

An enzyme increases the speed of a reaction:

NTS 2012
Biology
Enzymes
Elimination Tool:

A) by adding activation energy requirements

B) by lowering the activation energy requirements

C) by decreasing the concentration of products

D) by increasing the concentration of products

14 / 100

Category: Biology Ch 5 Class 12

Nutrition to egg in ovary is provided by which of the following?

PMC Practice 1
Biology
Growth and Development
Elimination Tool:

A) Germ cells

B) Milk cells

D) All of these

C) Follicle cells

15 / 100

Category: Biology Ch 8 Class 11

Yeasts, the unicellular fungi belongs mostly to the group:

UHS 2018
Biology
Kingdom Fungi
Elimination Tool:

A) Deuteromycota

C) Basidiomycota

B) Zygomycota

D) Ascomycota

16 / 100

Category: Biology

Q.10 Synaptic vesicles discharge which hormone at the neuromuscular junction?

A, acetylcholine

B. adrenaline

C. estradiol

D. testosterone

17 / 100

Category: Biology

Q.34 What molecule would you not expect to find in a refrovirus

A. Adenine

B. Thymine

C. Uracil

D Guanine

18 / 100

Category: Biology Ch 8 Class 11

The Kingdom of recyclers is known as kingdom

Algae

Bacteria

Fungi

Embryophata

19 / 100

Category: Biology Ch 9 Class 12

Which of the following is the components / tools of recombinant DNA technology?

PMC 2020
Biology
Biotechnology
Elimination Tool:

A) Gene of interest

B) Molecular scissors

C) Molecular glue and expression system

D) All of the above

20 / 100

Category: Biology Ch 7 Class 12

Crossing over takes place during _____ of meiosis.

UHS 2018
Biology
Cell Cycle
Elimination Tool:

A) Prophase I

B) Telophase I

D) Anaphase I

C) Metaphase I

21 / 100

Category: Biology

Genetic information in the DNA is encoded as:

NUMS Mock 1
Biology
Chromosomes and DNA

A) Deoxyribose sugar

B) Ribose sugar

C) Phosphate group

D) Sequence of nitrogenous bases

22 / 100

Category: Biology Ch 8 Class 12

Which statement about dominant and recessive alleles is not correct?

NTS 2016 SMBBMC
Biology
Variation and Genetics
Elimination Tool:

A) A dominant characteristic is seen in the phenotype of a heterozygote.

B) A homozygous genotype may be either dominant or recessive.

C) Recessive phenotypes always have two recessive alleles.

D) The phenotype of a homozygote is always dominant.

23 / 100

Category: Biology Ch 2 Class 12

In presence of muscle contraction, ______ is brought closer, _____ shortens and ______ disappears.

NUMS 2019 Reconduct
Biology
Support and Movement
Elimination Tool:

A) Z – line, H – zone, I – band

B) I – band, Z – line, H – zone

C) Z – line, I – band, H – zone

D) H – zone, I – band, Z – line

24 / 100

Category: Biology Ch 4 Class 11

Detoxification of drugs is the function of _____ in a cell.

NUMS 2016
Biology
Cell Structure and Function
Elimination Tool:

A) R.E.R

B) S.E.R

C) Liver cells

D) Lysosome

25 / 100

Category: Biology Ch 6 Class 11

The cell membrane of a bacterial cell often invaginates to produce membranous structures referred to as:

NUMS 2017
Biology
Kingdom Prokaryote
Elimination Tool:

A) Centrosomes

B) Mesosomes

C) Dictyosomes

D) Polysomes

26 / 100

Category: Biology Ch 4 Class 12

Luteinizing hormone, which is produced by the pituitary gland, promotes ovulation and stimulate the ovaries to produce:

NUMS 2019 Cancelled
Biology
Reproduction
Elimination Tool:

A) Estrogen

B) Estrogen and progesterone

C) Progesterone

D) Oxytocin

27 / 100

Category: Biology Ch 9 Class 11

Such inflorescence in which the main axis is elongated and bears sessile flowers is called:

NUMS 2015
Biology
Kingdom Plantae
Elimination Tool:

A) Raceme

C) Cyme

B) Spike

D) Panicle

28 / 100

Category: Biology Ch 2 Class 12

Growth movement caused in response to gravitational stimulus is called:

NTS 2011
Biology
Support and Movement
Elimination Tool:

A) Nutation

B) Geotropism

C) Nastic movement

D) Tropic movement

29 / 100

Category: Biology Ch 1 Class 12

Which of the following statement about conifers is correct?

Stored excretory products in vacuoles, at a concentration that leads to crystal formation.

ccumulate waste in leaves, which fall in autumn.

Production of black wood in the center.

Excrete some of the waste materials directly into soil, occasionally using them as a chemical weapon against other competing plants.

30 / 100

Category: Biology Ch 1 Class 12

In animals excess of nitrogen is excreted primarily in form of

Creatinine

Trimethyamine oxide

Pyrimidine

Ammonia

31 / 100

Category: Biology

At what point are two populations descending from the same ancestral stock considered separate species?

NUMS Mock 4
Biology
Evolution

A) When they can no longer produce viable, fertile offspring

B) When they look significantly different from each other

C) When they can interbreed successfully and produce offspring

D) When their habitats are separated by a significantly large distance so that they cannot meet

32 / 100

Category: Biology Ch 4 Class 11

What is the role of cholesterol in the cell membrane?

NUMS 2020
Biology
Cell Structure and Function
Elimination Tool:

A) it functions in joining adjacent cells together.

B) It functions in recognizing foreign cells.

C) It increases the rate of transport of ions across the membrane.

D) It stabilizes the cell membrane.

33 / 100

Category: Biology Ch 8 Class 11

Which of the following fungi is utilized in the baking industry?

NTS 2011
Biology
Kingdom Fungi
Elimination Tool:

A) Mushrooms

B) Yeast

C) Bread mold

D) Penicillium

34 / 100

Category: Biology Ch 5 Class 11

Viruses without nuclear envelope is called as?

PMC Sample 1
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) icosahedral virus

B) naked virus

C) enveloped virus

D) bilayer virus

35 / 100

Category: Biology Ch 9 Class 11

What is an example of sperms of liverworts, mosses, ferns which move towards archegonia, in response to nucleic acid released by the ovum?

PMC Practice 7
Biology
Kingdom Plantae
Elimination Tool:

A) Chemotropic movement

B) Chemonastic movement

C) Haptonastic movement

D) Chemotactic movement

36 / 100

Category: Biology Ch 13 Class 11

The respiratory pigment, which has much higher affinity to combine with oxygen is:

NUMS 2016
Biology
Gaseous Exchange
Elimination Tool:

A) Myoglobin

B) Globin

C) Haemoglobin

D) Hemocyanin

37 / 100

Category: Biology Ch 13 Class 12

The animals that feed on organic debris from decomposing plants and animals are called:

NUMS 2018
Biology
Man and His Environment
Elimination Tool:

A) Herbivores

B) Carnivores

C) Omnivores

D) Detritivores

38 / 100

Category: Biology Ch 6 Class 12

The particular array of chromosomes that an individual possesses is called its:

PMC 2020
Biology
Chromosomes and DNA
Elimination Tool:

A) Genotype

B) Phenotype

C) Karyotype

D) Allele

39 / 100

Category: Biology

Q.51 The heavy and light chains of an antibody molecule is held together by:

A. H-bonds

B. Disulphide bridges

C. Ionic interactions

D. Hydrophobic interactions

40 / 100

Category: Biology Ch 3 Class 11

The type of energy, reduced by the enzymes, for biological reactions to occur is called the:

UHS 2019
Biology
Enzymes
Elimination Tool:

A) Light Energy

B) Heat energy

C) Active energy

D) Activation energy

41 / 100

Category: Biology Ch 5 Class 11

Which one of the following is NOT a mode of transmission of AIDS?

NTS 2019
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Through unsterilized needles

B) Through contact with open wounds

D) Through holding hands

C) Through blood transfusion

42 / 100

Category: Biology Ch 8 Class 12

Phenotype for both TT and Tt is tall, so the allele T is known as:

NUMS 2019 Cancelled
Biology
Variation and Genetics
Elimination Tool:

A) Dominant

B) Recessive

C) Homozygous

D) Heterozygous

43 / 100

Category: Biology Ch 12 Class 11

The leaf is bilobed with midrib between them. The plant is

Saraccnia

Dionaea

Pitcher plant

None of these

44 / 100

Category: Biology Ch 3 Class 11

Which statement about enzyme is incorrect:

Some of them consist solely of protein with no non protein part.

They catalyze a chemical reaction without being utilized.

All enzymes are fibrous Proteins.

They without their cofactor are called apoenzyme.

45 / 100

Category: Biology Ch 4 Class 11

The process of membrane fusion and the movement of material out of the cell, is called:

NTS 2016 SMBBMC
Biology
Cell Structure and Function
Elimination Tool:

A) Phagocytosis

B) Endocytosis

C) Pinocytosis

D) Exocytosis

46 / 100

Category: Biology Ch 5 Class 12

Cells of fibers and tracheids elongate during

Phase of cell division

Phase of cell elongation

Phase of cell maturation

Phase of cell differentiation

47 / 100

Category: Biology Ch 2 Class 11

Carbon atom is

Monovalent

Divalent

Trivalent

48 / 100

Category: Biology

Nitrogen-fixing bacteria in root nodules fix nitrogen in soil air into:

NUMS Mock 1
Biology
Nutrition

A) Ammonia

B) Nitrite

C) Nitrate

D) Amino acid

49 / 100

Category: Biology Ch 6 Class 12

DNA has a helical shape with the diameter of

3 nm

4 nm

2 nm

5 nm

50 / 100

Category: Biology Ch 13 Class 12

Study of environmental relations is called:

NUMS 2018
Biology
Man and His Environment
Elimination Tool:

A) Physiology

B) Pulmonology

C) Morphology

D) Ecology

51 / 100

Category: Biology Ch 1 Class 12

The excretion of hypertonic urine in humans is associated best with the:

PMC 2020
Biology
Homeostasis
Elimination Tool:

A) Glomerular capsule

B) Proximal convoluted tubule

C) Loop of Henle

D) Distal convoluted tubule

52 / 100

Category: Biology Ch 10 Class 11

Which of the following phyla of Kingdom Animalia do humans belong to?

NTS 2018
Biology
Kingdom Animalia
Elimination Tool:

A) Mollusca

B) Arthropoda

C) Echinodermata

D) Chordata

53 / 100

Category: Biology Ch 12 Class 11

Fear of getting obese is termed as:

NUMS 2019 Cancelled
Biology
Nutrition
Elimination Tool:

A) Bulimia nervosa

B) Anorexia nervosa

C) Dyspepsia

D) Obesity

54 / 100

Category: Biology Ch 1 Class 12

High level of _____ and _____ in the blood and the contributing factors in the formation of kidney stones.

NUMS 2018
Biology
Homeostasis
Elimination Tool:

A) Calcium, oxalate

B) Calcium, magnesium

C) Calcium, sodium

D) Sodium, sulphate

55 / 100

Category: Biology Ch 1 Class 12

The mechanism of regulation, generally between organism and its environment, of solutes and the gain and the loss of water is called

Homeostasis

Hemostasis

Osmoregualtion

Thermoregulation

56 / 100

Category: Biology

Which trait is not sex-linked recessive:

NUMS Mock 2
Biology
Variation and Genetics

A) Haemophilia

B) Colour blindness

C) Hypophosphatemia

D) TFM syndrome

57 / 100

Category: Biology Ch 5 Class 11

Which of the following is the simplest form of pathogens causing diseases?

NTS 2018
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Viruses

B) Prions

C) Fungus

D) Amoeba

58 / 100

Category: Biology

The position of an organism in a food chain of an ecosystem called:

NUMS Mock 2
Biology
Man and His Environment

A) Level of ecosystem

B) Food chain

C) Food web

D) Trophic level

59 / 100

Category: Biology Ch 11 Class 12

Sequence of changes in community and its non-living environment over a period of time is

Niche

Succession

Alterations

Neo-ecology

60 / 100

Category: Biology Ch 8 Class 12

A pea plant with yellow seed was crossed to a plant having green seeds. What will happen in F1; if plants are true breeding

All seeds will be yellow

Half of seeds will be yellow

All the seeds will be green

Both will be present in ratio of 1:2:1

61 / 100

Category: Biology Ch 3 Class 12

The sense organs of taste in tongue are known as:

NUMS 2014
Biology
Coordination and Control
Elimination Tool:

A) Olfactory receptors

B) Gustatory receptors

C) Cutaneous receptors

D) All of these

62 / 100

Category: Biology Ch 5 Class 12

he only promoter of Leaf’s senescence in the following plant hormones is:

PMC Practice 9
Biology
Coordination and Control
Growth and Development
Elimination Tool:

A) Gibberellins

B) Cytokinins

C) Auxins

D) Abscisic acid

63 / 100

Category: Biology Ch 4 Class 12

Example of ovoviviparous

Reptiles

Mammal s

Duckbill platypus

Frog

64 / 100

Category: Biology Ch 10 Class 11

Opposable thumbs are characteristic features of

NUMS 2014
Biology
Kingdom Animalia
Elimination Tool:

A) Lagomorpha

B) Primates

C) Ederitate

D) None of these

65 / 100

Category: Biology

Which was the first virus to be successfully crystalized?

NUMS Mock 1
Biology
Bio-diversity | Variety of Life

A) TMV

B) Smallpox

C) Poliovirus

D) Adenovirus

66 / 100

Category: Biology Ch 4 Class 11

Autophagosomes are

Those lysosomes which eat parts of their own cells to generate energy.

Those lysosomes which eat old and worn out cellular organelles.

Lysosomes which help in extracellular digestion

Both a and b

67 / 100

Category: Biology Ch 10 Class 12

Whose theory of natural selection is essentially identical to Darwin’s theory?

NUMS 2019 Cancelled
Biology
Evolution
Elimination Tool:

A) Hardy-Weinberg

B) Alfred Wallace

C) Lyell

D) Mathus

68 / 100

Category: Biology Ch 2 Class 11

The disease caused by nutritional deficiency is:

NTS 2018
Biology
Biological Molecules
Elimination Tool:

A) Hepatitis

B) Cholera

C) Malaria

D) Beriberi

69 / 100

Category: Biology Ch 5 Class 11

The social organization of howling monkeys was studied by:

NUMS 2014
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Allen

B) Thorpe

C) Schjeldeup ebbe

D) Carpenter

70 / 100

Category: Biology Ch 13 Class 11

Number of spiracles present in the thorax of cockroach is

71 / 100

Category: Biology Ch 7 Class 11

Cyanobacteria resemble photosynthetic eukaryotes because they have:

PMC 2021 Tested
Biology
Kingdom Protista
Elimination Tool:

A) PS-I

B) None of these

C) PS-I and PS-II both

D) PS-II

72 / 100

Category: Biology Ch 6 Class 11

Who coined the term Animalcules for microorganisms like Bacteria and protozoa?

Robert Koch

Louis Pasteur

Alexander Fleming

Leeuwenhoek

73 / 100

Category: Biology

Which one of the following is common to all neurons?

NUMS Mock 3
Biology
Coordination and Control

A) A cell body which contains a nucleus

B) A thick myelin sheath

C) Presence of node of Ranvier

D) Presence of Schwann cells

74 / 100

Category: Biology Ch 13 Class 12

Geothermal energy is

. Energy obtained from nuclear fuel

Energy obtained from burning natural fuels

Heat energy trapped underground

Energy obtained from blowing hot winds

75 / 100

Category: Biology Ch 8 Class 11

Parasitic fungi absorb nutrients directly from the living host cytoplasm with the help of special hyphal tips called

Mildew

Constricting ring

Haustoria

All of thes

76 / 100

Category: Biology Ch 7 Class 12

Each kinetochore gets ________ fibers in mitosis

77 / 100

Category: Biology Ch 12 Class 11

Nitrogen

Magnesium

Iron

Both A and B

78 / 100

Category: Biology Ch 12 Class 11

Puccinia is a parasitic:

Plant

Fungus

Animal

Algae

79 / 100

Category: Biology Ch 9 Class 11

Which of the following is an ovoviviparous organism?

PMC Sample 3
Biology
Kingdom Plantae
Elimination Tool:

A) reptiles

B) mammals

C) frog

D) Duckbill platypus

80 / 100

Category: Biology Ch 9 Class 12

In the commercial manufacture of insulin, a human gene is inserted into which one of the following?

NTS 2013
Biology
Biotechnology
Elimination Tool:

A) A chromosome of a human cell

B) A protein molecule in a yeast cell

C) The DNA of a bacterium

D) The nucleic acid in a virus

81 / 100

Category: Biology Ch 9 Class 11

Which of the following is true in angiosperm life cycle?

NTS 2014
Biology
Kingdom Plantae
Elimination Tool:

A) Gametophyte are photosynthetic and partially independent than sporophyte

B) Sporophytes are totally dependent on gametophytes

C) Gametophytes are totally dependent on sporophytes

D) Both gametophytes and sporophytes are totally dependent on each other

82 / 100

Category: Biology Ch 7 Class 12

Synthesis of microtubules increases in:

UHS 2018
Biology
Cell Cycle
Elimination Tool:

A) M phase

B) S phase

C) G1 phase

D) G2 phase

83 / 100

Category: Biology Ch 1 Class 12

Which of the following marine fishes are considered direct descendents of fresh water ancestors?

Hagfish

Jelly Fish

Star Fish

Bony fishes

84 / 100

Category: Biology Ch 7 Class 12

Condensation of chromosomes reaches to the maximum during:

NUMS 2015
Biology
Cell Cycle
Elimination Tool:

A) Zygote

B) Pachytene

D) Diakinesis

C) Diplotene

85 / 100

Category: Biology

Q.21 The spent energy in the form pf ADP is regeneratèd by mitochondria into which of the following forni?

A. AMP

B.ATP

C.ADP

D.All of these

86 / 100

Category: Biology Ch 13 Class 11

Booklungs serve the function of respiration in:

NTS 2014
Biology
Gaseous Exchange
Elimination Tool:

A) Scorpion

B) Earthworm

C) Frog

D) Cockroaches

87 / 100

Category: Biology

Q.9 The linkage formed when one molecule of glucose combines with one molecule of fructose is:

A. 1, 2-glycosidic linkage

B. 1, 6-glycosidic linkage

C. 1, 4-glycosidic linkage

D. 1,3-glycosidic linkage

88 / 100

Category: Biology Ch 7 Class 11

Identify the correctly matched pair relating to a term and its meaning/function/example:

NTS 2017
Biology
Kingdom Protista
Elimination Tool:

A) nitrogen cycle… Rhizopus

B) denitrifying bacteria..change protein to ammonia

C) biosphere.. where life exists

D) lithosphere…water,air and soil.on the surface of earth

89 / 100

Category: Biology

Q.45 Muscle fatigue is characterized by all except:

A. Accumulation of lactic acid

B. pH drops

C. Cross bridges are unable to detach

D. Increased ATP concentration

90 / 100

Category: Biology Ch 9 Class 11

Which one of the following is not in the group of Gymnosperm?

NTS 2012
Biology
Kingdom Plantae
Elimination Tool:

A) Cycads

B) Gingko

C) Gnetae

E) Musci

91 / 100

Category: Biology Ch 5 Class 11

Viruses are ______ smaller than bacteria

10 – 100 times

10 – 1000 times

1000 – 10000 times

92 / 100

Category: Biology Ch 4 Class 11

_______ organelles are involved in the synthesis of the plant cell wall.

NUMS 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Endoplasmic reticulum

B) Golgi complex

C) Lysosomes

D) Peroxisomes

93 / 100

Category: Biology Ch 9 Class 12

By PCR we mean:

UHS 2018
Biology
Biotechnology
Elimination Tool:

A) Polymerase chronic reaction

B) Polymerase chain reaction

C) Polymerase copy reaction

D) Polymerase cross reaction

94 / 100

Category: Biology Ch 5 Class 11

It is very stable and allows viruses to exist in water, air, and the ground.

PMC Sample 1
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Nucleoproteins

B) Nucleocapsid

C) Tail of virus

D) Capsid

95 / 100

Category: Biology Ch 2 Class 12

Bones of the skull are joined by:

NTS 2011
Biology
Support and Movement
Elimination Tool:

A) Fixed joints

B) Sliding joints

C) Pivot joints

D) Hinge joints

96 / 100

Category: Biology Ch 6 Class 12

Genetic code is a ______ code and out of 64 codons, _____ are nonsense codons.

NUMS 2019 Reconduct
Biology
Chromosomes and DNA
Elimination Tool:

A) Single ; two

B) Single ; three

C) Triplet ; two

D) Triplet ; three

97 / 100

Category: Biology Ch 5 Class 12

Amniotic fluid in human embryo protects it from:

NUMS 2014
Biology
Growth and Development
Elimination Tool:

A) Degeneration

C) Encasement

B) Jerks

D) None of these

98 / 100

Category: Biology Ch 1 Class 12

The excretory product that requires minimum water for its elimination compared to others is:

NUMS 2017
Biology
Homeostasis
Elimination Tool:

A) Creatinine

B) Ammonia

C) Urea

D) Uric Acid

99 / 100

Category: Biology Ch 4 Class 11

Who coined the term CELL?

Schwann

Schleiden

Robert Hook

Both a and b

100 / 100

Category: Biology

The secondary and tertiary consumers are also known as:

NUMS Mock 1
Biology
Ecosystem

B) Herbivores

C) Abiotic factors

D) Decomposers

E) Carnivores

Your score is

The average score is 57%

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