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

In a marine environment, the ion secreted by the kidney is:

NUMS Mock 1
Biology

A) Na+

B) K+

C) Mg2+

D) Cl-

2 / 100

Category: Biology Ch 7 Class 11

Photosynthesis is absent in which of the following:

PMC 2021 Tested
Biology
Kingdom Protista
Elimination Tool:

A) Bacteria

B) None of these

C) Seaweeds

D) Mushrooms

3 / 100

Category: Biology Ch 6 Class 11

Rod-shaped bacteria are known as _______

UHS 2018
Biology
Kingdom Prokaryote
Elimination Tool:

A) Spirilla

B) Bacilli

C) Spirochete

D) Cocci

4 / 100

Category: Biology Ch 1 Class 12

Capillaries present around the loop of Henle:

NUMS 2018
Biology
Homeostasis
Elimination Tool:

A) Vasa recta

B) Peritubular

C) Lacteals

D) Glomerulus

5 / 100

Category: Biology

In human gut, chylomicrons are formed by the combination of:

NUMS Mock 1
Biology
Nutrition

A) Proteins and carbohydrates

B) Fats and proteins

C) Fats and carbohydrates

D) Vitamins and fats

6 / 100

Category: Biology Ch 13 Class 12

Which of the following describes an ecological niche?

NTS 2015 SMBBMC
Biology
Man and His Environment
Elimination Tool:

A) The habitat in which an organism finds its food supply

B) The habitat in which an organism find the most suitable climate

C) the relationship between an organism and other species

D) the way in which an environment is exploited by an organism

7 / 100

Category: Biology Ch 10 Class 12

Carolus Linnaeus was believer of which of the following?

PMC Sample 1
Biology
Evolution
Elimination Tool:

A) special creation

B) natural selection

C) catastrophism

D) Inheritance of acquired characters

8 / 100

Category: Biology

Q.15 The inhibitory effect of which inhibitor can be more dangerous in Krebs cycle?

A. Irreversible inhibitors

B. Competitive inhibitor

C. Reversible inhibitors

D. Non-competitive inhibitor

9 / 100

Category: Biology

Q.40 Which of the following is true of both bacterial conjugation and meiosis?

A. Both processes produce four haploid cells

B. Both processes are a form of asexual reproduction

C. Both processes involve genetic recombination

D. None of these

10 / 100

Category: Biology

Q.9 A surfactant is essential for:

A. Efficient gas exchange

B. Maintaining structural integrity of alveoli

C. Both A and B

D. None of these

11 / 100

Category: Biology Ch 4 Class 12

In which organism males are haploid?

PMC Sample 1
Biology
Reproduction
Elimination Tool:

A) Aphids

B) mosquito

C) butterfly

D) honey bee

12 / 100

Category: Biology Ch 6 Class 11

E. coli and example of entrobacteriace is important for causing diarrheal diseases its size is:

0.1-600 um

100-200 nm

1.1-1.5 um (width) 2.0-6.0 um (length)

0.75-1.25 um

13 / 100

Category: Biology Ch 3 Class 12

Which of the following is antagonist to Auxin in terms of promotion of stem growth?

Gibberellins

Cytokinins

Abscisic Acid

none of these.

14 / 100

Category: Biology

Which of the following blood transfusions can be made safely?

NUMS Mock 2
Biology
Variation and Genetics

A) Group A to group B

B) Group B to group AB

C) Group AB to group O

D) Group A to group O

15 / 100

Category: Biology Ch 13 Class 12

Which of the following statements is true about Savannah?

NTS 2015 DUHS and JSMU
Biology
Man and His Environment
Elimination Tool:

A) Dry season is very long and the temperature ranges more than 18 C throughout the year

B) Its plants do not shed off their leaves

C) The subsoil is permanently frozen

D) Rainfall is up to 200 cm per year

16 / 100

Category: Biology

Which of the following organelles are present in all the bacteria?

NUMS Mock 1
Biology
Kingdom Prokaryote

A) Mesosome

B) Golgi bodies

C) Mitochondria

D) Chloroplast

17 / 100

Category: Biology Ch 5 Class 12

Lateral meristems are present in

All plants

Gymnosperms and dicots

Monocots

In aquatic plants

18 / 100

Category: Biology Ch 10 Class 12

A group of interbreeding individuals belonging to a particular species and sharing a common geopraphic area is called?

PMC Sample 1
Biology
Evolution
Elimination Tool:

A) community

B) family

C) race

D) population

19 / 100

Category: Biology Ch 3 Class 12

Normal action potential of a neuronal cell is :

plus 50 mv

plus 60 mv

plus 70 mv

plus 80 mv

20 / 100

Category: Biology Ch 8 Class 11

The ecological role of fungi as decomposers is paralleled only by

UHS 2010
Biology
Kingdom Fungi
Elimination Tool:

A) Prions

B) Algae

C) Bacteria

D) Viruses

21 / 100

Category: Biology Ch 7 Class 11

Which part of bacteria is most delicate and damage to it can kill the bacteria?

PMC 2021 Tested
Biology
Kingdom Protista
Elimination Tool:

A) Cell wall

B) Slime

C) Capsule

D) Cell membrane

22 / 100

Category: Biology Ch 2 Class 12

How many metacarpals are present In the hand?

NTS 2013
Biology
Support and Movement
Elimination Tool:

A) 4

B) 3

C) 6

D) 5

23 / 100

Category: Biology

Optimum pH for action of pepsin and salivary amylase is

NUMS Mock 2
Biology
Nutrition

A) 3.5 and 7.7 respectively

B) 1.8 and 6.8 respectively

C) 6.8 and 7.4 respectively

D) 1.8 and 7.4 respectively

24 / 100

Category: Biology Ch 2 Class 11

Which of the following is the constituent of RNA molecule?

NUMS 2019 Cancelled
Biology
Biological Molecules
Elimination Tool:

A) Fatty acids

B) Ribulose

C) Ascorbic acid

E) Ribonucleic acid

25 / 100

Category: Biology Ch 8 Class 11

Drug obtained from fungus used for lowing blood cholesterol is

UHS 2010
Biology
Kingdom Fungi
Elimination Tool:

A) Lovastatin

B) Cyclosporin

C) Ergotin

D) Griseofulvin

26 / 100

Category: Biology Ch 2 Class 12

When the muscle is required to contract, calcium ion binds with ______ molecule and causes them to move slightly.

NUMS 2019 Cancelled
Biology
Support and Movement
Elimination Tool:

A) Actin

B) Myosin

C) Troponin

D) Tropomyosin

27 / 100

Category: Biology Ch 10 Class 12

Natural selection can amplify or diminish variations that are

Non heritable

Heritable

Both heritable and non heritable

Acquired

28 / 100

Category: Biology Ch 10 Class 11

The Porifera are pore – bearing animals, commonly called:

NUMS 2018
Biology
Kingdom Animalia
Elimination Tool:

A) Corals

B) Sponges

C) Hydras

D) Anemones

29 / 100

Category: Biology

Q.30 Arterial blood contains ___________of CO2/100 ml of blood:

30 / 100

Category: Biology

Which of the following basic structural level of proteins is indicated by an association of two alpha and two beta chains in the haemoglobin molecule?

NUMS Mock 4
Biology
Biological Molecules

A) Primary structure

B) Secondary structure

C) Tertiary structure

D) Quatenary Structure

31 / 100

Category: Biology

Which of the following single membranous organelle is absent in plant cells?

a. Vacuole

B. Golgi apparatus

C. Lysosomes

D. Endoplasmic reticulum

32 / 100

Category: Biology

Q.47 The chemical nature of oxytocin is:

A. Protein

B. Amino acid derivative

C. Polypeptide

D. Steroid Incorrect

33 / 100

Category: Biology Ch 7 Class 12

How does the second meiotic division differ from mitosis? In the second meiotic division:

NTS 2015 SMBBMC
Biology
Cell Cycle
Elimination Tool:

A) Chiasmata Formed between the chromatids of a bivalent

B) Each chromosome replicates to form two chromatids during metaphase

C) The separating chromatids of a pair differ genetically

D) None of the above

34 / 100

Category: Biology Ch 3 Class 12

Which of the following statement about neuron is incorrect?

They not only conduct impulses but also generate them.

They are not the only cellular component of nervous system.

They may show limited regenerative capabilities.

Like all the living cell, when they mature and divide to form similar cells.

35 / 100

Category: Biology Ch 9 Class 12

Which of the following diseases CANNOT be cured by gene therapy?

NUMS 2019 Reconduct
Biology
Biotechnology
Elimination Tool:

A) SCID

B) Tuberculosis

C) Cystic fibrosis

D) Cancer

36 / 100

Category: Biology

Q.35 Enzymes for light-dependent reactions of photosynthesis would most likely be associated with:

A. Outer membrane of the chloroplast

B. Inner membrane of the chloroplast

C. Stroma of the chloroplast

D. Thylakoid membranes of the chloroplast

37 / 100

Category: Biology Ch 4 Class 12

Which of these cycles operate in human females?

PMC Sample 2
Biology
Reproduction
Elimination Tool:

A) Oestrous cycle

B) Menstrual cycle

C) Both Options A and B are correct

D) None of these options is correct

38 / 100

Category: Biology Ch 6 Class 12

The length of okazaki fragments in eukayotes is

150–250 nucleotides long

200-300 nucleotides

1000-2000 nucleotde

100-200 nucleotides

39 / 100

Category: Biology Ch 9 Class 12

Enzyme used by the Bacteria to cut the DNA of the invading Virus for its protection is:

UHS 2018
Biology
Biotechnology
Elimination Tool:

A) Restriction Exonuclease

B) Restriction Ligase

C) Restriction Endonuclease

D) DNA polymerase

40 / 100

Category: Biology Ch 1 Class 12

Secondary cell wall of sclerenchyma cells is impregnated with

Cellulose

Peptidoglycan and murein.

Lignin

Pectin

41 / 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

42 / 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

43 / 100

Category: Biology Ch 12 Class 11

A psychological condition usually seen in girls and young women, with loss of appetite is:

NTS 2011
Biology
Nutrition
Elimination Tool:

A) Obesity

B) Malnutrition

C) Anorexia Nervosa

D) Dyspepsia

44 / 100

Category: Biology Ch 2 Class 11

Which of the following has the ability to develop ester linkage with the OH group of Pentose sugar?

NUMS 2015
Biology
Biological Molecules
Elimination Tool:

A) Purine

B) Pyrimidine

C) H3PO4

D) HNO3

45 / 100

Category: Biology

In chemiosmosis, the proton (H+) moves from _______.

NUMS Mock 4
Biology
Bioenergetics

A) Stroma to Lumen

B) Cytoplasm to Stroma

C) Lumen to Stroma

D) Stroma to cytoplasm

46 / 100

Category: Biology Ch 6 Class 12

Within the chromosomes, each chromatid contains ______ DNA molecule:

NUMS 2020
Biology
Chromosomes and DNA
Elimination Tool:

A) One

B) Two

C) Three

D) Half

47 / 100

Category: Biology

When were bacteriophages discovered by Twort?

NUMS Mock 2
Biology
Bio-diversity | Variety of Life
Variety of Life

A) 1915

B) 1920

C) 1910

D) 1820

48 / 100

Category: Biology Ch 9 Class 11

Which type of leucoplasts store lipids?

NUMS 2020
Biology
Kingdom Plantae
Elimination Tool:

A) Amyloplast

B) Elaioplast

C) Proteinoplast

D) Etioplast

49 / 100

Category: Biology Ch 2 Class 12

Select a sessile zooflagellate:

NUMS 2020
Biology
Support and Movement
Elimination Tool:

A) Trichonympha

B) Trypanosoma

C) Choanoflagellate

D) Euglena

50 / 100

Category: Biology

Carbon dioxide joins the photosynthetic pathway at:

NUMS Mock 1
Biology
Bioenergetics

A) PSI

B) PSII

C) Light reaction

D) Dark reaction

51 / 100

Category: Biology Ch 14 Class 11

An example of passive acquired immunity is?

NTS 2015 DUHS and JSMU
Biology
Transport
Elimination Tool:

B) use of polio vaccine

C) passing of certain antibodies to the foetus by the pregnant women

D) inoculation of antitoxin in the case of puncture wound

E) both C and D

52 / 100

Category: Biology

Q.46 The path of electrons through the two photosystems is called?

A. S scheme

B.X scheme

C.Z Scheme

D. Y scheme

53 / 100

Category: Biology Ch 10 Class 12

Which of the following theories or evolution can best explain the vestigial organs.

NUMS 2014
Biology
Evolution
Elimination Tool:

A) Darwinism

B) Lamarckism

C) Natural selection

D) Special creation

54 / 100

Category: Biology Ch 4 Class 11

During digesting the phagocytosed food particles vesicles formed from fusion of phagocytic vacuole with the enzymes secreted by Golgi apparantus are called

Lysosomes

Primary lysosomes

Secondary lysosomes

Food vacuole

55 / 100

Category: Biology Ch 6 Class 12

The Meselson and Stahl experiment confirmed that DNA replicates in _____ manner.

NUMS 2019 Reconduct
Biology
Chromosomes and DNA
Elimination Tool:

A) Conservative

B) Semi – conservative

C) Dispersive

D) New synthesis

56 / 100

Category: Biology

Q.6 All of the following are the functions of endoplasmic reticulum except:

A. Nerve impulse conduction

B. Transport of material

C. Mechanical support

D. Synthesis of conjugated molecules

57 / 100

Category: Biology Ch 11 Class 12

The role a species plays in a community including behavior and influence is

Nichon

Niche

Autecology

Profession

58 / 100

Category: Biology Ch 1 Class 12

The site and principal mechanism for the passage of glucose into the bloodstream in the human kidney is the:

NTS 2014
Biology
Homeostasis
Elimination Tool:

A) collecting duct …. by active secretion

C) glomerulus …. by selective reabsorption

D) glomerulus …. by ultrafiltration

E) Proximal convoluted tubule …. By active reabsorption

59 / 100

Category: Biology Ch 6 Class 12

The phenomenon known as crossing-over occurs during:

NTS 2017
Biology
Chromosomes and DNA
Elimination Tool:

A) Mitosis

B) Meiosis

C) Geographic distribution

D) Active transport

60 / 100

Category: Biology Ch 6 Class 12

Which is incorrect?

Chromosomes 1st observed by walther Fleming

Chromosomal theory of inheritance 1st formulated by Walter Sutton

1st evidence of hereditary nature of DNA provided by Friedrich Meischer

. Sex chromosomes discovered by Thomas Hunt Morgan

61 / 100

Category: Biology

Q45 During birth which of following act as birth canal?

A. Oviduct

B. Ovary

C. Uterus

D. Vagina

62 / 100

Category: Biology Ch 12 Class 12

In polluted lake which organisms dominate the community

Fish

Crustaceans

Phytoplanktons

Blue green algae

63 / 100

Category: Biology Ch 6 Class 12

In Maxam – Gilbert method, DNA threads are:

NUMS 2015
Biology
Chromosomes and DNA
Elimination Tool:

A) Chemically synthesized

B) Synthesized from mRNA

C) Synthesized by using terminating nucleotides

D) Chemically cut into pieces

64 / 100

Category: Biology Ch 13 Class 11

Active site of Rubisco is evolved to bind

CO2

Both of these

H2O

65 / 100

Category: Biology

Which of the following is NOT a difference that would allow one to distinguish between a prokaryotic and a eukaryotic cell?

Presence of absence of the nucleus
Presence or absence of the cell wall
Membrane bound versus no membrane bound organelles
NUMS Mock 3
Biology
Cell Structure and Function

A) I only

B) II only

C) III only

D) I and II only

66 / 100

Category: Biology

Q.49 In reproduction, semen refers to which of the following?

A. fluid and sperms

B. Blood and water

C. Blood and sperms

D. Blood and fluid

67 / 100

Category: Biology

Which of the following is not an infection of the lungs/respiratory tract?

NUMS Mock 2
Biology
Gaseous Exchange

A) Histoplasmosis

B) Tuberculosis

C) Cystic fibrosis

D) None of the given options

68 / 100

Category: Biology Ch 8 Class 11

The Kingdom of recyclers is known as kingdom

Algae

Bacteria

Fungi

Embryophata

69 / 100

Category: Biology

Process ensuring the survival of species over long periods of time, even though individual members of the species die.

NUMS Mock 2
Biology
Man and His Environment

A) Reproduction

B) Adaptability

C) Mitosis

D) Respiration

70 / 100

Category: Biology Ch 3 Class 11

The optimum pH of catalase is:

NUMS 2018
Biology
Enzymes
Elimination Tool:

A) Slightly alkaline

B) Highly acidic

C) Highly alkaline

D) Slightly acidic

71 / 100

Category: Biology

Q48 Which statement is incorrect about Lock and Key Model?

A. Specific enzyme can transform only a specific substrate

B. Active site of an enzyme is a non-flexible structure

C. Active site does not change before during or even after the reaction

D. It explains the mechanism of every chemical reaction

72 / 100

Category: Biology Ch 13 Class 11

Oxygen is transported by combining with ……….. in Hb.

NUMS 2015
Biology
Gaseous Exchange
Elimination Tool:

A) Nitrogen

B) Iron

D) Hydrogen

C) Carbon

73 / 100

Category: Biology Ch 6 Class 12

Transfer of genetic material from one cell to another that can alter the genetic makeup of recipient cell is called

Mutation

Transuction

Replication

Variation

74 / 100

Category: Biology Ch 4 Class 12

What is the commercial method of producing millions of seedlings in limited time?

NUMS 2016
Biology
Reproduction
Elimination Tool:

A) Parthenogenesis

B) Parthenocarpy

C) Cutting

D) Grafting

75 / 100

Category: Biology Ch 3 Class 12

How many meninges cover the human brain?

NTS 2014
Biology
Coordination and Control
Elimination Tool:

A) 5

B) 4

C) 3

D) 2

76 / 100

Category: Biology Ch 6 Class 11

Cyanobacteria have which of the following type of cell wall?

PMC Sample 2
Biology
Kingdom Prokaryote
Elimination Tool:

A) Gram positive

B) Gram negative

C) Cellulose

D) Acid fast

77 / 100

Category: Biology Ch 10 Class 12

Key point to Lamarck’s view about organic evolution is that every offspring

NUMS 2014
Biology
Evolution
Elimination Tool:

A) is similar to its parents

B) inherits characters acquired by the parental generation

C) shows struggle for existence

D) repeats phylogeny in its ontogeny

78 / 100

Category: Biology Ch 12 Class 11

In planaria, numerous small branches which end blindly are called as

Digestive tract

Intestinal caeca

Hepatic caeca

Both B & C

79 / 100

Category: Biology Ch 7 Class 11

Lime stone deposits are formed from

Zooflagellates

Foraminferans

Aetinopods

Apicomplexans

80 / 100

Category: Biology Ch 9 Class 12

Transgenic plants are produced when foreign genes are introduced into

Mature plant embryo

Immature plant embryo

Roots

Leaves

81 / 100

Category: Biology

Q.57 Electron transport chain pumps protons across the membrane from __________ to ____________.

A. Thylakoid space, stroma

B. Inter-membrane space, stroma

C. Stroma, inter-membrane space

D. Stroma, thylakoid space

82 / 100

Category: Biology

Cardiac output is increased by all of the following EXCEPT:

NUMS Mock 2
Biology
Transport

A) Hypoxia

B) Exercise

C) Sleep

D) Pregnancy

83 / 100

Category: Biology Ch 3 Class 12

Nissl’s granules are present in which part of the neuron?

Axoplasm

Myelin sheath.

Dendrite

Soma

84 / 100

Category: Biology Ch 13 Class 11

Lungs are separated from abdominal cavity by a muscular sheath called:

NUMS 2018
Biology
Gaseous Exchange
Elimination Tool:

A) Pleura

B) Rib cage

C) Pericardium

D) Diaphragm

85 / 100

Category: Biology

What type of atom is the carbon atom?

NUMS Mock 2
Biology
Biological Molecules

A) Divalent

B) Monovalent

C) Trivalent

D) Tetravalent

86 / 100

Category: Biology

Q.32 In the ascent of sap, water moves up in:

A. Xylem

B. Cambium

C. Phloem

D. Endodermis

87 / 100

Category: Biology

Which organ(s) in the male reproductive system produce gametes?

NUMS Mock 4
Biology
Reproduction

A) Vas deferens

B) Malpighian tubule system

C) Seminiferous tubules

D) Ejaculatory duct

88 / 100

Category: Biology Ch 9 Class 12

Genetic engineering has been successfully used for producing;

UHS 2019
Biology
Biotechnology
Elimination Tool:

A) Animals, with inferior traits.

B) Transgenic mice for testing safety of polio vaccine before use in humans

C) Animals, that have the same genetic constitution.

D) None of the above

89 / 100

Category: Biology Ch 4 Class 12

All of the following are sexually transmitted diseases except:

NTS 2011
Biology
Reproduction
Elimination Tool:

A) Syphilis

B) Gonorrhea

C) Alzheimer's Disease

D) Genital Herpes

90 / 100

Category: Biology

In genetics, the term locus refers to the ______ of the gene on the chromosome.

NUMS Mock 4
Biology
Chromosomes and DNA

A) Position

B) Frequency

D) Inversion

C) Copy

91 / 100

Category: Biology Ch 11 Class 12

Diverse and stable community at the end of succession is

Diverse Climax communityand stable community at the end of succession is A. Climax community B. Pioneers community C. Top community D. Stable community Answer & Explanation Answer: Option A

Pioneers community

Top community

Stable community A

92 / 100

Category: Biology Ch 9 Class 12

A single stranded nucleotide sequence that will hybridize into a certain piece of DNA is

Primer

Probe

Genome

Both a & b

93 / 100

Category: Biology Ch 13 Class 12

In a forest, there are a lot of plants; trees, shrubs, and herbs. What will the Palm trees face if they grow in the same forest?

NTS 2019
Biology
Man and His Environment
Elimination Tool:

A) Intraspecific competition.

B) Interspecific competition

C) Environmental competition

D) All of the above

94 / 100

Category: Biology Ch 12 Class 11

Food is assimilated into the body from digestive tract in:

NUMS 2014
Biology
Nutrition
Elimination Tool:

A) Esophagus

B) Stomach

C) Small intestine

D) Rectum

95 / 100

Category: Biology

Q.19 Of the following, which one is not included in protostomes:

A. Arthropods

B. Poriferans

C. Annelids

D. Coelenterates

96 / 100

Category: Biology Ch 1 Class 11

It is possible to date the rocks by comparing the amount of specific radioactive isotopes they contain. Which of the statement is correct in this respect:

Older sediment layers have equal amount of these reaioactive isotopes as that of the young ones

Older sediment layers have less amount of these reaioactive isotopes as that of the young ones.

Older sediment layers have greater amount of these radioactive isotopes as that of the young ones.

Older sediment layers did not have these radioactive isotopes

97 / 100

Category: Biology

The idea that opposed the idea of abiogenesis was proposed by?

NUMS Mock 4
Biology
Cell Structure and Function

A) Robert Hooke

B) Robert Brown

C) Rudolph Virchow

D) Lorenz Oken

98 / 100

Category: Biology Ch 12 Class 11

The structure which prevents the entry of food particles into the respiratory passage is:

NUMS 2019 Cancelled
Biology
Nutrition
Elimination Tool:

A) Hard palate

B) Epiglottis

C) Soft palate

D) Larynx

99 / 100

Category: Biology Ch 1 Class 12

Purine and pyrimidine catabolism results in production of

Creatinine

Trimethyamine oxide

Xanthine

None of these

100 / 100

Category: Biology Ch 4 Class 12

Male and female sea urchins release their sperm and eggs Into the water where fertilization takes place. How can their reproduction be described?

NTS 2013
Biology
Reproduction
Elimination Tool:

A) asexual reproduction which results in genetically dissimilar offspring

B) asexual reproductlon whlch results In genetically identical offspring

C) Sexual reproduction which results in genetically dissimilar offspring

D) Sexual reproduction which results in genetically identical offspring

Your score is

The average score is 57%

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