FORTIUS - PYQ based Unit Test # 1 (OLD NCERT)

Botany - Section A

1.

Which one of the following is not a lateral meristem
1. Interfascicular cambium
2. Phellogen
3. Intercalary meristem
4. Intrafascicular cambium

2.

If you are asked to classify the various algae into distinct groups, which of the following characters you should choose ?
1. Types of pigments present in the cell
2. Nature of stored food materials in the cell
3. Structural organisation of thallus
4. Chemical compositions of the cell wall

3.

Which of the statements given below is not true about the formation of Annual Rings in trees?

1.	Annual rings are not prominent in trees of temperate regions.
2.	Annual rings are a combination of spring wood and autumn wood produced in a year.
3.	Differential activity of cambium causes light and dark bands of tissue - early and late wood respectively.
4.	Activity of cambium depends upon variation in climate.

4.

Which one of the following matches is correct?

1.	Alternaria	Sexual reproduction absent	Deuteromycetes
2.	Mucor	Reproduction by Conjugation	Ascomycetes
3.	Agaricus	Parasitic fungus	Basidiomycetes
4.	Phytophthora	Aseptate mycelium	Basidiomycetes

5.

Life cycles of Ectocarpus and Fucus respectively are:
1. Diplontic, Haplodiplontic
2. Haplodiplontic, Diplontic
3. Haplodiplontic, Haplontic
4. Haplontic, Diplontic

6.

Nomenclature is governed by certain universal rules. Which one of the following is contrary to the rules of nomenclature?

1.	When written by hand, the names are to be underlined
2.	Biological names can be written in any language
3.	The first word in a biological name represents the genus name, and the second is a specific epithet
4.	The names are written in Latin and are italicized

7.

Match the following:

(a)	Inhibitor of catalytic activity	(i)	Ricin
(b)	Possess peptide bonds	(ii)	Malonate
(c)	Cell wall material in fungi	(iii)	Chitin
(d)	Secondary metabolite	(iv)	Collagen

Choose the correct option from the following:

	(a)	(b)	(c)	(d)
1.	(iii)	(i)	(iv)	(ii)
2.	(iii)	(iv)	(i)	(ii)
3.	(ii)	(iii)	(i)	(iv)
4.	(ii)	(iv)	(iii)	(i)

8.

The correct floral formula of chilli is

1.		2.
3.		4.

9.

Select the correct statement:

1.	The leaves of gymnosperms are not well adapted to extremes of climate
2.	Gymnosperms are both homosporous and heterosporous
3.	Salvinia, Ginkgo and Pinus all are gymnosperms
4.	Sequoia is one of the tallest trees

10.

Leaves become modified into spines in
1. Cactus
2. Rose
3. Citrus
4. Pistia

11.

Anatomically, fairly old dicotyledonous root is distinguished from the dicotyledonous stem by
1. absence of secondary xylem
2. absence of secondary phloem
3. presence of cortex
4. position of protoxylem

12.

Which of the following statements about viruses is correct ?
1. Viruses contain either DNA or RNA
2. Viruses possess their own metabolic system
3. Viruses are facultative parasites
4. Viruses are readily killed by antibiotics

13.

Selaginella and Salvinia are considered to represent a significant step toward evolution of seed habit because:

1.	Female gametophyte is free and gets dispersed like seeds.
2.	Female gametophyte lacks archegonia.
3.	Megaspores possess endosperm and embryo surrounded by seed coat.
4.	Embryo develops in female gametophyte which is retained on parent sporophyte.

14.

Alage have cell wall made up of –
1. Cellulose, galactans and mannans
2. Hemicellulose, pectins and proteins
3. Pectins, cellulose and proteins
4. Cellulose, hemicellulose and pectins

15.

In a longitudinal section of a root, starting from the tip upward, the four zones occur in the following order:

1.	Root cap, cell division, cell enlargement, cell maturation
2.	Root cap, cell division, cell maturation, cell enlargement
3.	Cell division, cell enlargement, cell maturation, root cap
4.	Cell division, cell maturation, cell enlargement, root cap

16.

Phloem in gymnosperms lacks:
1. Both sieve tubes and companion cells
2. Albuminous cells and sieve cells
3. Sieve tubes only
4. Companion cells only

17.

Biosystematics aims at:

1.	The classification of organisms based on broad morphological characters
2.	Delimiting various taxa of organisms and establishing their relationships
3.	The classification of organisms based on their evolutionary history and establishing their phylogeny on the totality of various parameters from all fields of studies
4.	Identification and arrangement of organisms on the basis of cytological characteristics

18.

Given below is a schematic break-up of the phases/stages of cell cycle-

Which one of the following is the correct indication of the stage/phase in the cell cycle?

1.	B-Metaphase	2.	C-Karyokinesis
3.	D-Synthetic phase	4.	A-Cytokinesis

19.

Match the columns and identify the correct option.

	Column I		Column II
A.	Thylakoids	1.	Disc-shaped sacs in Golgi apparatus
B.	Cristae	2.	Condensed structure of DNA
C.	Cisternae	3.	Flat membranous sacs in stroma
D.	Chromatin	4.	Infolding in mitochondria

	A	B	C	D
1.	4	3	1	2
2.	3	4	1	2
3.	3	1	4	2
4.	3	4	2	1

20.

Secondary xylem and secondary phloem in dicot stem are produced by
1. Apical meristems
2. Axillary meristems
3. Phellogen
4. Vascular cambium

21.

Select wrong statement.
1. The viroids were discovered by D.J lvanowski.
2. W.M Stanley showed that viruses could be crystallized.
3. The term 'contagium vivum fluidum' was coined by MW Beijerinck.
4. Mosaic disease in tobacco and AIDS in human beings are caused by viruses.

22.

There exists a close association between the alga and the fungus within a lichen. The fungus:

1.	Provides food for the alga
2.	Provides protection, anchorage and absorption for the alga
3.	Fixes the atmospheric nitrogen for the alga
4.	Releases oxygen for the alga

23.

Which of the following is not a characteristic feature during mitosis in somatic cells?
1. Spindle fibres
2. Disappearance of nucleolus
3. Chromosome movement
4. Synapsis

24.

The structures that help some bacteria to attach to rocks and/or host tissues are:

1.	Fimbriae	2.	Mesosomes
3.	Holdfast	4.	Rhizoids

25.

Middle lamella is composed mainly of

1.	Phosphoglycerides	2.	Hemicellulose
3.	Muramic acid	4.	Calcium pectate

26.

Vascular bundles in monocotyledons are considered closed because
1. a bundle sheath surrounds each bundle
2. cambium is absent
3. there are no vessels with perforations
4. xylem is surrounded all around by phloem

27.

The wheat grain has an embryo with one large, shield-shaped cotyledon known as

1.	epiblast	2.	coleorrhiza
3.	scutellum	4.	coleoptile

28.

Ovary is half-inferior in the flower of

1.	Apple	2.	Guava
3.	Peach	4.	Garlic

29.

Select the wrong statement.

1.	Diatoms are microscopic and float passively in water.
2.	The walls of diatoms are easily destructible.
3.	‘Diatomaceous earth’ is formed by the cell walls of diatoms.
4.	Diatoms are chief producers in the oceans.

30.

Examine the figure given below and select the right option giving all the four parts (A, B, C and D) correctly identified:

	A	B	C	D
1.	Antheridiophore	Male thallus	Globule	Roots
2.	Archegoniophore	Female thallus	Gemma cup	Rhizoids
3.	Archegoniophore	Female thallus	Bud	Foot
4.	Seta	Sporophyte	Protonema	Rhizoids

31.

Following are the statements with reference to 'lipids'.

(a)	Lipids having only single bonds are called unsaturated fatty acids.
(b)	Lecithin is a phospholipid.
(c)	Trihydroxy propane is glycerol.
(d)	Palmitic acid has 20 carbon atoms including carboxyl carbon.
(e)	Arachidonic acid has 16 carbon atoms.

Choose the correct statements from the options given below.

1. (b) and (c) only
2. (b) and (e) only
3. (a) and (b) only
4. (c) and (d) only

32.

Many ribosomes may associate with a single mRNA to form multiple copies of a polypeptide simultaneously. Such strings of ribosomes are termed as

1.	Polysome	2.	Polyhedral bodies
3.	Plastidome	4.	Nucleosome

33.

Which among the following are the smallest living cells known without a definite cell wall that are pathogenic to plants as well as animals and can survive without oxygen?
1. Bacillus
2. Pseudomonas
3. Mycoplasma
4. Nostoc

34.

The osmotic expansion of a cell kept in water is chiefly regulated by

1.	Mitochondria	2.	Vacuoles
3.	Plastids	4.	Ribosomes

35.

A student observed algae with chlorophyll 'a', 'd', and phycoerythrin. It should belong to:

1.	Phaeophyta	2.	Rhodophyta
3.	Chlorophyta	4.	Bacillariophyta

Botany - Section B

36.

During which phase(s) of cell cycle, amount of DNA in a cell remains at 4C level if the initial amount is denoted as 2C?

1.	G₀ and G₁	2.	G₁ and S
3.	Only G₂	4.	G₂ and M

37.

Chromosomes in a bacterial cell can be 1–3 in number and:

1.	Are always circular
2.	Are always linear
3.	Can be either circular or linear, but never both within the same cell
4.	Can be circular as well as linear within the same cell

38.

Cymose inflorescence is present in:

1.	Solanum	2.	Sesbania
3.	Trifolium	4.	Brassica

39. Maximum nutritional diversity is found in which of the following group?
1. Fungi
2. Animalia
3. Monera
4. Plantae

40.

In the dicot root, the vascular cambium originates from:

1.	Tissue located below the phloem bundles and a portion of pericycle tissue above protoxylem
2.	Cortical region
3.	Parenchyma between endodermis and pericycle
4.	Intrafascicular and interfascicular tissue in a ring

41.

The chief water conducting elements of xylem in gymnosperms are

1.	vessels	2.	fibres
3.	transfusion tissue	4.	tracheids

42.

Which of the following statements is incorrect about gymnosperms?
1. They are heterosporous
2. Male and female gametophytes are free-living
3. Most of them have narrow leaves with thick cuticle
4. Their seeds are not covered

43. Match the items given in Column I with those in Column II and select the correct option given below-

	Column I		Column II
a.	Herbarium	i.	It is a place having a collection of preserved plants and animals.
b.	Key	ii.	A list that enumerates methodically all the species found in an area with brief description aiding identification.
c.	Museum	iii.	Is a place where dried and pressed plant specimens mounted on sheets is kept.
d.	Catalogue	iv.	A booklet containing a list of characters and their alternates which are helpful in identification of various taxa.

	a	b	c	d
1.	i	iv	iii	ii
2.	iii	ii	i	iv
3.	ii	iv	iii	i
4.	iii	iv	i	ii

44.

In Bougainvillea, thorns are the modifications of:
1. Adventitious root
2. Stem
3. Leaf
4. Stipules

45.

Floridean starch has structure similar to:
1. Amylopectin and glycogen
2. Mannitol and algin
3. Laminarin and cellulose
4. Starch and cellulose

46.

The most abundant prokaryotes helpful to humans in making curd from milk and in production of antibiotics are the ones categorized as
1. Cyanobacteria
2. Archaebacteria
3. Chemosynthetic autotrophs
4. Heterotrophic bacteria

47.

What is exclusive for angiosperms?
1. Vessels
2. Secondary growth
3. Double fertilisation
4. Autotrophic nature

48.

Flower are Zygomorphic in

1.	Mustard	2.	Gulmohur
3.	Tomato	4.	Datura

49.

Chlorophyll occurs in chloroplast in

1.	Inner membrane	2.	Thylakoid membrane
3.	Outer membrane	4.	Stroma

50.

Which of the following is the simplest amino acid?

1.	Alanine	2.	Asparagine
3.	Glycine	4.	Tyrosine

Zoology - Section A

51.

From the following statements, select the wrong one:

1.	Prawn has two pairs of antennae
2.	Millipedes have two pairs of appendages in each segment of the body
3.	Animals belonging to the phylum Porifera are exclusively marine
4.	Nematocysts are characteristic of the phylum Cnidaria

52.

In contrast to Annelids, Platyhelminths show
1. Absence of body cavity
2. Presence of pseudocoelom
3. Radial symmetry
4. Bilateral symmetry

53.

Which of the following characteristics is not shared by birds and mammals?

1.	Breathing using lungs	2.	Viviparity
3.	Warm blooded nature	4.	Ossified endoskeleton

54.

Which one of the following pairs of animals are similar to each other pertaining to the feature stated against them?

1.	Pteropus and Ornithorhynchus– Viviparity
2.	Garden lizard and Crocodile - Three chambered heart
3.	Ascaris and Ancylostoma - Metameric segmentation
4.	Sea horse and Flying fish - Cold blooded (poikilothermal)

55.

Which one of the following categories of animals, is correctly described with no single exception in it?

1.	All reptiles possess scales, have a three chambered heart and are cold blooded (poikilothermal).
2.	All bony fishes have four pairs of gills and an operculum on each side.
3.	All sponges are marine and have collared cells.
4.	All mammals are viviparous and possess diaphragm for breathing.

56.

Identify the vertebrate group of animals characterized by crop and gizzard in its digestive system:

1.	Amphibia	2.	Reptilia
3.	Aves	4.	Osteichthyes

57.

All vertebrates are chordates but all chordates are not vertebrates, why?

1.	Notochord is replaced by a vertebral column in adults of some chordates.
2.	Ventral hollow nerve cord remains throughout life in some chordates.
3.	All chordates possess a vertebral column.
4.	All chordates possess notochord throughout their life.

58.

Which one of these animals is not a homeotherm?

1.	Macropus	2.	Chelone
3.	Camelus	4.	Psittacula

59. In which of the following animals, the digestive tract has additional chambers like crop and gizzard?
1. Pavo, Psittacula, Corvus
2. Corvus, Columba, Chameleon
3. Bufo, Balaenoptera, Bangarus
4. Catla, Columba, Crocodilus

60.

Which of the following is true for nucleolus?
1. Larger nucleoli are present in dividing cells.
2. It is a membrane-bound structure.
3. It takes part in spindle formation.
4. It is a site for active ribosomal RNA synthesis.

61.

Metameric segmentation is the characteristic of

1.	Mollusca and chordata
2.	Platyhelminthes and arthropoda
3.	Echinodermata and annelida
4.	Annelida and arthropoda

62.

Which of the following characteristic features always hold true for the corresponding group of animals?

1.	Viviparous	(1)	Mammalia
2.	Possess a mouth with an upper and a lower jaw	(2)	Chordata
3.	3-chambered heart with one incompletely divided ventricle	(3)	Reptilia
4.	Cartilaginous - Endoskeleton	(4)	Chondrichthyes

63.

Which one of the following is the most abundant protein in the animals?

1.	Collagen	2.	Lectin
3.	Insulin	4.	Hemoglobin

64.

Which of the following statements is not correct?

1.	Lysosomes are formed by the process of packaging in the endoplasmic reticulum.
2.	Lysosomes have numerous hydrolytic enzymes.
3.	The hydrolytic enzymes of lysosomes are active under acidic pH.
4.	Lysosomes are membrane bound structure.

65.

In the somatic cell cycle:

1.	DNA replication takes place in S-phase
2.	A short interphase is followed by a long mitotic phase
3.	G₂ phase follows mitotic phase
4.	In G₁ phase, DNA content is double the amount of DNA present in the original cell

66.

Antiparallel strands of a DNA molecule means that

1.	the phosphate groups of two DNA strands, at their ends, share the same position
2.	the phosphate groups at the start of two DNA strands are in opposite position (pole)
3.	one strand turns clockwise
4.	one strand turns anti-clockwise

67. Choanocyte is found in:
1. Protozoa
2. Porifera
3. Coelenterates
4. Ctenophora

68.

Which of the following statements wrongly represents the nature of smooth muscle?
1. Communication among the cells is performed by intercalated discs
2. These muscles are present in the wall of blood vessels
3. These muscles have no striations
4. They are involuntary muscles

69.

Which of the following are not polymeric?

1.	nucleic acids	2.	proteins
3.	polysaccharides	4.	Lipids

70.

Which of the following animals is not viviparous?

1.	Flying fox (bat)	2.	Elephant
3.	Platypus	4.	Whale

71.

Select the correct sequence of organs in the alimentary canal of cockroach starting from mouth:
1. Pharynx $\to$ Oesophagus $\to$ Ileum $\to$ Crop $\to$ Gizzard $\to$ Colon $\to$ Rectum
2. Pharynx $\to$ Oesophagus $\to$ Crop $\to$ Gizzard $\to$ Ileum $\to$ Colon $\to$ Rectum
3. Pharynx $\to$ Oesophagus $\to$ Gizzard $\to$ Crop $\to$ Ileum $\to$ Colon $\to$ Rectum
4. Pharynx $\to$ Oesophagus $\to$ Gizzard $\to$ Ileum $\to$ Crop $\to$ Colon $\to$ Rectum

72.

Which one of the following statements about certain given animals is correct?
1. Molluscs are acoelomates
2. Insects are pseudocoelomoates
3. Flatworms (Platyhelminthes) are coelomates
4. Roundworms (Aschelminthes) are pseudocoelomates

73.

Match Column I with Column II for housefly classification and select the correct option using the codes given below:

	Column I		Column II
A.	Family	I.	Diptera
B.	Order	II.	Arthropoda
C.	Class	III.	Muscidae
D.	Phylum	IV.	Insecta

	A	B	C	D
1.	III	I	IV	II
2.	III	II	IV	I
3.	IV	III	II	I
4.	IV	II	I	III

74.

Which of the following stages of meiosis involves division of centromere?

1.	Anaphase II	2.	Telophase II
3.	Metaphase I	4.	Metaphase II

75.

Match List-I with List-II.

	List-I		List-II
(a)	Protein	I.	C-C double bonds
(b)	Unsaturated fatty acid	II.	Phosphodiester bonds
(c)	Nucleic acid	III.	Glycosidic bonds
(d)	Polysaccharides	IV.	Peptide bonds

Choose the correct answer from the options given below.

	(a)	(b)	(c)	(d)
1.	(ii)	(i)	(iv)	(iii)
2.	(iv)	(iii)	(i)	(ii)
3.	(iv)	(i)	(ii)	(iii)
4.	(i)	(iv)	(iii)	(ii)

76.

Crossing over takes place between which chromatids and in which stage of the cell cycle?

1.	Non-sister chromatids of non-homologous chromosomes at Zygotene stage of prophase I.
2.	Non-sister chromatids of homologous chromosomes at Pachytene stage of prophase I.
3.	Non-sister chromatids of homologous chromosomes at Zygotene stage of prophase I.
4.	Non-sister chromatids of non-homologous chromosomes at Pachytene stage of prophase I.

77.

The Golgi complex plays a major role

1.	in digesting proteins and carbohydrates
2.	as energy transferring organelles
3.	in post translational modification of proteins and glycosidation of lipids
4.	in trapping the light and transforming it into chemical energy

78.

The ciliated columnar epithelial cells in humans are known to occur in
1. bronchioles and fallopian tubes
2. bile duct and oesophagus
3. fallopian tubes and urethra
4. eustachian tube and stomach lining

79.

Which one of the following is not considered as a part of the endomembrane system?

1.	Lysosome	2.	Golgi complex
3.	Peroxisome	4.	Vacuole

80.

The diagram given below shows the germs layer. The animals having structures shown in the figures A and B are respectively called

1.	Diploblastic, Triploblastic	2.	Triploblastic, Diploblastic
3.	Diploblastic, Diploblastic	4.	Triploblastic, Triploblastic

81.

The animals with bilateral symmetry in the young stage and radial pentamerous symmetry in the adult stage, belong to the phylum:

1.	Mollusca	2.	Cnidaria
3.	Echinodermata	4.	Annelida

82.

Which one of the following organisms bear hollow and pneumatic long bones?

1. Macropus
2. Ornithorhynchus
3. Neophron
4. Hemidactylus

83.

Match the following cell structure with its characteristic feature :

(a)	Tight junctions	(i)	Cement neighbouring cells together to form sheet
(b)	Adhering junctions	(ii)	Transmit information through chemical to another cells
(c)	Gap junctions	(iii)	Establish a barrier to prevent leakage of fluid across epithelial cells
(d)	Synaptic junctions	(iv)	Cytoplasmic channels to facilitate communication between adjacent cells

Select correct option from the following:

	(a)	(b)	(c)	(d)
1.	(ii)	(iv)	(i)	(iii)
2.	(iv)	(ii)	(i)	(iii)
3.	(iii)	(i)	(iv)	(ii)
4.	(iv)	(iii)	(i)	(ii)

84.

The concept of "Omnis cellula-e-cellula" regarding cell division was first proposed by:

1.	Aristotle	2.	Rudolf Virchow
3.	Theodor Schwann	4.	Schleiden

85.

Which stage of meiotic prophase shows terminalisation of chiasmata as its distincitve feature?

1.	Diakinesis	2.	Pachytene
3.	Leptotene	4.	Zygotene

Zoology - Section B

86.

In which of the following, the notochord is present in the embryonic stage?

1.	All chordates	2.	Some chordates
3.	Only Vertebrates	4.	Non-chordates

87.

Given below are two statements:

I:	Amphibians and reptiles have a 3-chambered heart with two atria and a single ventricle, and are oviparous in nature
II:	Crocodiles possess a 4 chambered heart with two ventricles and two atria and are viviparous in nature

Select the most appropriate option:
1. I is correct but II is incorrect.
2. I is incorrect but II is correct.
3. Both I and II are correct.
4. Both I and II are incorrect.

88.

As per fluid mosaic model, lipids and integral proteins can diffuse randomly. The model has been modified in several aspects. Which of the following statements is incorrect?
1. Protein of cell membrane can travel within lipid bilayer
2. Protein of cell membrane can undergo flip-flop movement in lipid bilayer
3. Protein can remain confined within certain domains of the membrane
4. Many proteins remain completely embedded within lipid bilayer

89.

Match the following columns and select the correct option.

	Column I		Column II
a.	6 - 15 pairs of gill slits	(i)	Trygon
b.	Heterocercal caudal fin	(ii)	Cyclostomes
c.	Air bladder	(iii)	Chondrichthyes
d.	Poison sting	(iv)	Osteichthyes

	(a)	(b)	(c)	(d)
1.	(iii)	(iv)	(i)	(ii)
2.	(iv)	(ii)	(iii)	(i)
3.	(i)	(iv)	(iii)	(ii)
4.	(ii)	(iii)	(iv)	(i)

90.

What will you look for to identity the sex of the following? Select the correct match.

1.	Male frog – a copulatory pad on the first digit of the hind limb
2.	Female cockroach – anal cerci
3.	Male shark – claspers borne on pelvic fins
4.	Female Ascaris – sharply curved posterior end

91.

If the head of cockroach is removed, it may live for few days because:
1. The cockroach does not have nervous system
2. The head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body
3. The head holds a 1/3^rd of a nervous system while the rest is situated along the dorsal part of its body
4. The supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen

92.

The figure below shows the structure of a mitochondrion with its four parts labelled (A), (B), (C) and (D). Select the part correctly matched with its function.

1.	Part (A) : Matrix – major site for respiratory chain enzymes
2.	Part (D) : Outer membrane – gives rise to inner membrane by splitting
3.	Part (B) : Inner membrane – forms infoldings called cristae
4.	Part (C) : Cristae – possess single circular DNA molecule and ribosome

93.

Attachment of spindle fibers to kinetochores of chromosomes becomes evident in:

1.	Anaphase	2.	Telophase
3.	Prophase	4.	Metaphase

94.

Which one of the following characteristic is incorrect with respect to cockroach?
1. In females, 7^th - 9^th sterna together form a genital pouch.
2. 10^th abdominal segment in both sexes, bears a pair of anal cerci.
3. A ring of gastric caeca is present at the junction of midgut and hind gut.
4. Hypopharynx lies within the cavity enclosed by the mouth parts.

95.

Which one of the following biomolecules is correctly characterised ?

1.	Palmitic acid - an unsaturated fatty acid with 18 carbon atoms
2.	Adenylic acid - adenosine with a glucose phosphate molecule
3.	Alanine amino acid - Contains an amino group and an acidic group anywhere in the molecule
4.	Lecithin - a phosphorylated glyceride found in cell membrane

96.

A non-proteinaceous enzyme is
1. lysozyme
2. ribozyme
3. ligase
4. deoxyribonuclease

97.

ATP is:

1.	Nucleotide	2.	Nucleoside
3.	Nucleic acid	4.	Vitamin

98.

Microtubules are the constituents of
1. spindle fibres, centrioles and cilia
2. centrioles, spindle fibres and chromatin
3. centrosome, nucleosome and centrioles
4. cilia, flagella and peroxisomes

99.

Which one of the following animals is correctly matched with its particular named taxonomic category?
1. Tiger - tigris, the species
2. Cuttlefish - Mollusca, a class
3. Humans - Primata, the family
4. Housefly - Musca, an order

100.

Identify the meiotic stage in which the homologous chromomes separate while the sister chromatids remain associated at their centromeres:

1.	Anaphase I	2.	Anaphase II
3.	Metaphase I	4.	Metaphase II

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