Question

5. Charles Darwin and Alfred Russell Wallace were the first people to propose A. that Earth is older than a few thousand years. B. that species go extinct and new species take their place. C. that evolution occurs. D. a mechanism for how evolution occurs. E. a mechanism for how evolution occurs that is consistently supported by new evidence.

could somebody help me please with these 4 questions

Answer 1

5. Charles Darwin and Alfred Russel both of them independently gave theory for the mechanism of evolution . Their theory was supported by number of evidences from fossils and other morphological and physiological similarities between organisms.

Option E is the right one.

9. Resistance is caused due to increase in frequency of already existing variant. Because of the antibiotic present in the medium, the bacteria which are susceptible will die. Only resistant bacteria survive. Number of resistant bacteria increase with more exposure to the antibiotic. So in the future generations only resistant variety will be seen.

B is the right option.

15. All organisms have the desire to survive and hence keep on adapting to their surroundings. This leads to evolution

A option is the right

22. Non-random reproduction can change the phenotype frequencies but does not introduce new alleles. So allele frequency does not change.

Option B is the right one.