XII: Chapter 1- Reproduction in organisms

Question 1

The life spans of organisms are correlated with their sizes. True or false?

Answer 1

False. The life spans of organisms are not correlated with their sizes.

Question 2

Clones are only genetically similar. True/false?

Answer 2

False. Clones are both morphologically and genetically similar organisms.

Question 3

How many layers does the cyst wall of amoeba have?

Answer 3

3

Question 4

What are the many minute amoeba formed by multiple fission called?

Answer 4

Pseudopodiospores

Question 5

How is dahlia cultivated vegitatively?

Answer 5

Through the nodes present on its modified stem

Question 6

What grows from the nodes of tubers?

Answer 6

Roots and new plant

Question 7

Do annual plants show clear cut vegetative, reproductive and senescent phases?

Answer 7

Yes

Question 8

Do biennial plants show clear cut vegetative, reproductive and senescent phases?

Answer 8

Yes

Question 9

Do perennial plants show clear cut vegetative, reproductive and senescent phases?

Answer 9

No

Question 10

How many times does bamboo flower in its lifetime?

Answer 10

Once

Question 11

Neelkuranji flowers once in every

Answer 11

12 years

Question 12

What are responsible for changes between the three phases of life in animals and plants?

Answer 12

Hormone

Question 13

Which term is used to denote bisexual condition in fungi?

Answer 13

Homothallous

Question 14

Which term is used to denote bisexual condition in plants?

Answer 14

Monoecious

Question 15

Are cucurbits monoecious or dioecious?

Answer 15

Monoecious

Question 16

Is coconut monoecious or dioecious?

Answer 16

Monoecious

Question 17

Is date palm monoecious or dioecious?

Answer 17

Dioecious

Question 18

Which cells in diploid organisms undergo meiosis?

Answer 18

Meiocytes (gamete mother cell)

Question 19

What is the universal event in life cycle of all sexually reproducing organism?

Answer 19

Formation of a zygote

Question 20

What is the vital link that ensures the continuity of species between organisms of one generation and the next?

Answer 20

Zygote

Question 21

What is the life span of Mayfly?

Answer 21

1 day

Question 22

What is the unit of clone (of an organism)?

Answer 22

Ramet

Question 23

What kind of binary fission is found in euglena?

Answer 23

Longitudinal

Question 24

What kind of binary fission is found in paramoecium?

Answer 24

Transverse

Question 25

What kind of binary fission is found in ceratium?

Answer 25

Oblique

Question 26

What is the form of asexual reproduction in which multinucleated cell divides into many multinucleated daughter cells called?

Answer 26

Plasmotomy

Question 27

How many nucleus are found in the daughter cells formed through plasmotomy?

Answer 27

Many

Question 28

Plasmotomy is found in

Answer 28

Giant amoeba, opalina

Question 29

Strobilation is a modified form of

Answer 29

Transverse fission

Question 30

What are ring like structures present in organisms undergoing strobilation called?

Answer 30

Ephyra

Question 31

What is the segmented body formed through strobilation called?

Answer 31

Strobila

Question 32

Strobilation is found in

Answer 32

Jelly fish, tape worm

Question 33

Internal budding is found in

Answer 33

Sponges

Question 34

Are zoospores formed in zoosporangium endogenously or exogenously?

Answer 34

Endogenously

Question 35

Do zoospores have cell wall?

Answer 35

No

Question 36

Chlamydospores are formed from

Answer 36

Hyphal cells

Question 37

In what conditions are oidia found?

Answer 37

Excess water condtion

Question 38

Oidia are formed in which organisms?

Answer 38

Fungi

Question 39

Regeneration was first discovered in which organism?

Answer 39

Hydra

Question 40

Who discovered regeneration in organisms?

Answer 40

Abraham Trembly

Question 41

What should be the size of the fragment of hydra so that it can undergo fragmentation?

Answer 41

> 1/6 mm

Question 42

Who coined the term apomyxis?

Answer 42

Winkler

Question 43

What is the vegatative propagule in artichoke?

Answer 43

Tuber

Question 44

What is the vegatative propaguale in banana?

Answer 44

Rhizome

Question 45

What is the modification of stem found in chrysanthemum?

Answer 45

Sucker

Question 46

What is the modification of stem found in mint?

Answer 46

Sucker

Question 47

What is the modification of stem found in strawberry?

Answer 47

Stolon

Question 48

What is the modification of stem found in pineapples?

Answer 48

Bulbils

Question 49

What is the modification of stem found in oxalis?

Answer 49

Bulbils

Question 50

Which cuttings are used for the horticulture of lemon?

Answer 50

Root cuttings

Question 51

Which cuttings are used for the horticulture of apple?

Answer 51

Root cuttings

Question 52

Which cuttings are used for the horticulture of strawberry?

Answer 52

Root cuttings

Question 53

Which cuttings are used for the horticulture of rose?

Answer 53

Stem cuttings

Question 54

Which cuttings are used for the horticulture of sugarcane?

Answer 54

Stem cuttings

Question 55

Which cuttings are used for the horticulture of begonia?

Answer 55

Leaf cuttings

Question 56

Which cuttings are used for the horticulture of bryophillum?

Answer 56

Leaf cuttings

Question 57

In a stem grafting, which part is the stock?

Answer 57

Root system

Question 58

Stem grafting cannot be performed in which angiosperms?

Answer 58

Monocots

Question 59

In bud grafting, the scion is the

Answer 59

Bud

Question 60

Which cuttings are used in layering?

Answer 60

Root cuttings

Question 61

In layering, advenitious roots are made to grow from

Answer 61

Soft stems (basal shoot branches)

Question 62

Mund layering is practised in which plants?

Answer 62

Apple, pear, grape, strawberry, cherry

Question 63

Air layering is practised in which plants?

Answer 63

Litchi, guava, orange

Question 64

Ovoviviparity is found in

Answer 64

Sharks, rays, snakes, fishes, and insects

Question 65

Kangaroos are | (1) Viviparous (2) Oviparous (3) Ovoviviparous (4) A distinct category

Answer 65

1) Viviparous

Question 66

What is the difference between the division of micronucleus and macronucleus in paramoecium?

Answer 66

Micronucleus divides by mitosis. | Macronucleus divides by amitosis.

Question 67

Complete parthenogenesis is found in

Answer 67

Rock lizard

Question 68

What is the type of parthenogenesis in which only males are produced called?

Answer 68

Arrhenotoky

Question 69

What is the type of parthenogenesis in which only females are produced called?

Answer 69

Thallotoky

Question 70

WHat type of parthenogenesis is found in honey bees?

Answer 70

Arrhenotoky

Question 71

What is endogamy?

Answer 71

Gametes which fuse belong to the same parent