XII: Chapter 1- Reproduction in organisms Flashcards
The life spans of organisms are correlated with their sizes. True or false?
False. The life spans of organisms are not correlated with their sizes.
Clones are only genetically similar. True/false?
False. Clones are both morphologically and genetically similar organisms.
How many layers does the cyst wall of amoeba have?
3
What are the many minute amoeba formed by multiple fission called?
Pseudopodiospores
How is dahlia cultivated vegitatively?
Through the nodes present on its modified stem
What grows from the nodes of tubers?
Roots and new plant
Do annual plants show clear cut vegetative, reproductive and senescent phases?
Yes
Do biennial plants show clear cut vegetative, reproductive and senescent phases?
Yes
Do perennial plants show clear cut vegetative, reproductive and senescent phases?
No
How many times does bamboo flower in its lifetime?
Once
Neelkuranji flowers once in every
12 years
What are responsible for changes between the three phases of life in animals and plants?
Hormone
Which term is used to denote bisexual condition in fungi?
Homothallous
Which term is used to denote bisexual condition in plants?
Monoecious
Are cucurbits monoecious or dioecious?
Monoecious
Is coconut monoecious or dioecious?
Monoecious
Is date palm monoecious or dioecious?
Dioecious
Which cells in diploid organisms undergo meiosis?
Meiocytes (gamete mother cell)
What is the universal event in life cycle of all sexually reproducing organism?
Formation of a zygote
What is the vital link that ensures the continuity of species between organisms of one generation and the next?
Zygote
What is the life span of Mayfly?
1 day
What is the unit of clone (of an organism)?
Ramet
What kind of binary fission is found in euglena?
Longitudinal
What kind of binary fission is found in paramoecium?
Transverse
What kind of binary fission is found in ceratium?
Oblique
What is the form of asexual reproduction in which multinucleated cell divides into many multinucleated daughter cells called?
Plasmotomy
How many nucleus are found in the daughter cells formed through plasmotomy?
Many
Plasmotomy is found in
Giant amoeba, opalina
Strobilation is a modified form of
Transverse fission
What are ring like structures present in organisms undergoing strobilation called?
Ephyra
What is the segmented body formed through strobilation called?
Strobila
Strobilation is found in
Jelly fish, tape worm
Internal budding is found in
Sponges
Are zoospores formed in zoosporangium endogenously or exogenously?
Endogenously
Do zoospores have cell wall?
No
Chlamydospores are formed from
Hyphal cells
In what conditions are oidia found?
Excess water condtion
Oidia are formed in which organisms?
Fungi
Regeneration was first discovered in which organism?
Hydra
Who discovered regeneration in organisms?
Abraham Trembly
What should be the size of the fragment of hydra so that it can undergo fragmentation?
> 1/6 mm
Who coined the term apomyxis?
Winkler
What is the vegatative propagule in artichoke?
Tuber
What is the vegatative propaguale in banana?
Rhizome
What is the modification of stem found in chrysanthemum?
Sucker
What is the modification of stem found in mint?
Sucker
What is the modification of stem found in strawberry?
Stolon
What is the modification of stem found in pineapples?
Bulbils
What is the modification of stem found in oxalis?
Bulbils
Which cuttings are used for the horticulture of lemon?
Root cuttings
Which cuttings are used for the horticulture of apple?
Root cuttings
Which cuttings are used for the horticulture of strawberry?
Root cuttings
Which cuttings are used for the horticulture of rose?
Stem cuttings
Which cuttings are used for the horticulture of sugarcane?
Stem cuttings
Which cuttings are used for the horticulture of begonia?
Leaf cuttings
Which cuttings are used for the horticulture of bryophillum?
Leaf cuttings
In a stem grafting, which part is the stock?
Root system
Stem grafting cannot be performed in which angiosperms?
Monocots
In bud grafting, the scion is the
Bud
Which cuttings are used in layering?
Root cuttings
In layering, advenitious roots are made to grow from
Soft stems (basal shoot branches)
Mund layering is practised in which plants?
Apple, pear, grape, strawberry, cherry
Air layering is practised in which plants?
Litchi, guava, orange
Ovoviviparity is found in
Sharks, rays, snakes, fishes, and insects
Kangaroos are
(1) Viviparous (2) Oviparous (3) Ovoviviparous (4) A distinct category
1) Viviparous
What is the difference between the division of micronucleus and macronucleus in paramoecium?
Micronucleus divides by mitosis.
Macronucleus divides by amitosis.
Complete parthenogenesis is found in
Rock lizard
What is the type of parthenogenesis in which only males are produced called?
Arrhenotoky
What is the type of parthenogenesis in which only females are produced called?
Thallotoky
WHat type of parthenogenesis is found in honey bees?
Arrhenotoky
What is endogamy?
Gametes which fuse belong to the same parent
