LIVING WORLD Flashcards
Who has been called the Darwin of the 20th century?
Ernst Mayr
which are the twin characteristics of growth?
increase in mass and increase in number of individuals
A multicellular organism grows by
cell division
In plants, this growth by cell division occurs
continuously throughout their life span
in animals growth is seen
upto a certian age
In majority of higher animals and plants, growth and reproduction are
mutually exclusive events
In living organisms, growth is
from inside
Is growth a defining property of living organisms?
No
The fungi, the filamentous algae and the protonema of mosses, all easily multiply by
fragmentation
Reproduction is synonymous with growth in
Amoeba
Which organisms do not reproduce?
mules, sterile worker bees, infertile human couples
The sum total of all the chemical reactions occurring in our body is
metabolism
An isolated metabolic reaction outside the body of an organism, performed in a test tube is
1) living
2) non-living
3) neither living or non-living
3) neither living not nonliving
Isolated metabolic reactions in vitro are not living things but surely
living reactions
The most obvious and technically complicated feature of all living organisms is
the ability to sense their surroundings or environment
