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