Advertisements
Advertisements
Question
With the help of any two suitable examples explain the effect of anthropogenic actions on organic evolution.
Solution
Anthropogenic activities have caused increased rate of organic evolution.
For example:
(i) The excess use of herbicides and pesticides in the agricultural field by the humans to kill pests and insects has resulted in selection of resistant variety of pests and insects over a short time span. The change favored resistant pests and insects which lead to their evolution
(ii) The excess use of antibiotics has caused selection of drug resistant microbes. The microbes sensitive to antibiotics died but few variants having resistance against it survived. This led to evolution of more fatal microbes.
APPEARS IN
RELATED QUESTIONS
Mammals : _________ : : Amphibia : Fishes
Four students P, Q, R and S differently reported the following set of organs to be analogous :
P. Forelimb of a frog and forelimb of a lizard
Q. Forelimb of a bird and forelimb of a human
R. Wings of a parrot and wings of a butterfly
S. Wings of a bird and wings of a bat
The two students who have reported correctly are :
(A) P and Q
(B) Q and R
(C) R and S
(D) P and S
Can the wing of a butterfly and the wing of a bat be considered homologous organs? Why or why not?
Give the importance of fossil in support of organic evolution
You have potato, carrot, radish, sweet potato, tomato and ginger bought from the market in your jute bag. Identify two vegetables to represent the correct homologous structures.
(A) Potato and tomato
(B) Carrot and tomato
(C) Potato and sweet potato
(D) Carrot and radish
_____________ is a vestigial organ in human beings.
Appendix : vestigial organ : : Peripatus : ____________
Homologous organs and vestigial organs are examples of ______ type of evidence in evolution.
Palaeontological evidence for evolution refers to the ______.
Write names of some vestigial organs in the human body.
