Living World NCERT Flashcards
_____ was Harvard University ________ biologist who called as ‘The Darwin of the 20th
century’, was one of the 100 greatest
scientists of all time.
Ernst Mayr; evolutionary
Ernst Mayr was born at ________, (Germany/England).
Kempton, Germany
Ernst Mayr assumed the title of
He assumed the title of “Alexander Agassiz Professor of Zoology Emeritus”.
Ernst Mayr is known for
Mayr is awarded as the triple crown of biology:
1) Balzan Prize in 1983,
2) International Prize for Biology in 1994,
3) Crafoord Prize in 1999
What is the purpose of life?
This has a philosophical answer. As scientists, we will try to reflect on – what is living?
The twin characteristics of growth are increase in ______ and increase in ______.
mass; number of individuals
Cell division occurs in which _______ (plant/animal) up to which age.
Occurs in both 1. Plants - throughout their lifespan
2. Animals (unicellular/multicellular) - up to a certain age
____ occurs in certain tissues to replace lost cells.
Cell division
We can easily observe unicellular organisms’ growth in which culture?
In-vitro culture
In majority of higher animals and plants, _____ and ____ are mutually exclusive events.
growth; reproduction
Three examples of non-living things which exhibit growth by accumulation of material on the surface are
Mountains,boulders and sand mounds
Living organisms grow ____ (intrinsically/extrinsically)
Intrinsically
Dead organism also grows. (T/F)
False,
Dead organisms does not grow.
Growth is a defining property of living organism.
(T/F)
False
Growth and Reproduction are characteristic of all living organism.
(T/F)
True
____ and ____ refers to Sexual reproduction.
Invariably; Implicitly
Fungi produce millions of ________ to multiply and spread easily.
asexual spores
What type of asexual reproduction occurs in yeast and hydra?
budding
Which organism shows true regeneration?
Planaria (flatworms)
Name three organisms which easily multiply by fragmentation
The fungi, the filamentous algae, and the protonema of mosses
In which organisms reproduction is synonymous with growth, i.e. increase in number of cells?
In unicellular organisms like bacteria, unicellular algae or Amoeba
We are not very clear about the usage of 2 terms in unicellular organisms:-
Growth and reproduction
Name three living organisms which do not reproduce.
Mules, sterile worker bees and infertile human couples
Reproduction is all-inclusive defining characteristics of living organisms.
(T/F)
False
Non-living objects are capable of reproduction or replicating by itself.
(T/F)
False,
All the living organisms are made up of ____ which belongs to of various classes, sizes, functions, etc.
Chemicals
____ are constantly made and changed into some other biomolecules in all living organism.
Chemicals
There are thousands of ____ reactions occurring simultaneously inside all living organisms.
Chemical/metabolic reactions
Who exhibit metabolism?
All plants, animals, fungi and microbes exhibit metabolism.
Sun total of all the chemical reaction occurring in our body is ____
Metabolism
Non-living object exhibits metabolism
(T/F)
False
Metabolic reactions can be demonstrated outside the body in ____ systems.
Cell-free systems
Isolated metabolic reactions outside the body, in a test tube is living or non-living?
Neither living nor non-living
Which reactions are not living things but surely living reactions?
Isolated metabolic reaction in-vitro
Metabolism is a defining feature of all living organisms ____ (with/without) exception.
Without any exception
Cellular organization of body is not a defining feature of life forms.
(T/F)
False
Most complicated feature of all living organism is ability to ______
sense their environment and respond to it through sense organ
Plant responds to external factors like _____
Like light, water, temperature, other organism, pollutants, etc.
Which process affects reproduction in seasonal breeders, both plants and animals?
Photoperiod
What is the range of the number of species that are known and described?
1.7 to 1.8 million
The number and types of organisms present on earth refers to
Biodiversity