What forms the basis for evolutionary processes?
Genetic mutations and natural selection forms the basis of evolution
Which of the following statements, support the view that elaborate sexual reproductive process appeared much later in the organic evolution? (i) Lower groups of organisms have simpler body design. (ii) Asexual reproduction is common in lower groups. (iii) Asexual reproduction is common in higher groups of organisms. (iv) The high incidence of sexual reproduction in angiosperms and vertebrates.
Given below are four statements (A - D) each with one or two blanks. Select the option which correctly fills up the blanks in two statements. (A) Wings of butterfly and birds look alike and are the results of __(i)__ evolution. (B) Miller showed that $$CH_{4}, H_{2}, NH_{3}$$ and __(i)__ when exposed to electric discharge in a flask resulted in formation of __(ii)__. (C) Vermiform appendix is a __(i)__ organ and an __(ii)__ evidence of evolution. (D) According to Darwin evolution took place due to __(i)__ and __(ii)__ of the fittest.
Which of the following statements is correct?
Evolution of life shows that life forms had a trend of moving from _________________.
Evolution of life shows that life forms had a trend of moving from _________________.
Genetic drift operates in which of the following population?