Science
Heredity and Evolution
Practice questions
How are fossils useful as evidence of evolution?What is usually concluded about a fossil found in a deeper rock layer?Why can human hand and forelimb of horse be considered homologous organs?Why do analogous organs not give strong evidence of common ancestry even if they perform similar functions?Why are bird wings and insect wings called analogous organs?Why is eye colour inherited while a haircut is an acquired trait?How does classification help in understanding evolution?If two organisms show greater similarity, what can be inferred about their evolutionary relationship?Why can it be risky to decide evolutionary relationship only by external appearance?What is the importance of struggle in Darwin's idea of natural selection?What is the relation between adaptation and natural selection?If green insects survive attacks by birds more often in an environment, what may happen over time?Why must variation be inherited for natural selection to act over generations?If a pea plant has one dominant and one recessive form for height, how can the dwarf form appear in its offspring?Why is evolution considered a process across generations rather than one individual's lifetime?How are fossils and homologous organs both evidence of evolution?How can small inherited changes in organisms produce a large change over a long time?In which condition can the direction of natural selection change?What is the main reason for studying heredity and evolution together?If an organism gets a scar during its life why is the same scar not passed to its offspring?