NEET · Biology · Evolution doubts
20 doubts found
What does “Natural selection” actually mean in Evolution, and why does it matter for NEET?
individuals best adapted to their environment survive and reproduce more, so their traits spread.
A bird's wing and a butterfly's wing do the same job, so why are they NOT evidence of common ancestry?
They are analogous, not homologous.
I keep getting “Natural selection” questions wrong in Evolution. What's the trap?
reading it as 'survival of the strongest'.
A recessive disease allele has a frequency of 0.1 in a population. Using Hardy-Weinberg, what fraction are carriers?
Let q = 0.1 for the recessive allele, so p = 1 - q = 0.9.
What does “Variation and adaptation” actually mean in Evolution, and why does it matter for NEET?
inherited differences among individuals provide the raw material selection acts on.
What does “Homologous vs analogous organs” actually mean in Evolution, and why does it matter for NEET?
homologous organs share structure but differ in function (common ancestry, divergent evolution); analogous organs share function but differ in structure (convergent evolution).
I keep getting “Variation and adaptation” questions wrong in Evolution. What's the trap?
thinking organisms change themselves on purpose to adapt.
I keep getting “Homologous vs analogous organs” questions wrong in Evolution. What's the trap?
treating any organs that do the same job as evidence of common ancestry.
What does “Hardy–Weinberg principle” actually mean in Evolution, and why does it matter for NEET?
allele frequencies in a large, undisturbed population stay constant — no evolution.
What does “Natural selection” actually mean in Evolution, and why does it matter for NEET?
individuals with favourable heritable traits survive and reproduce more, shifting the population over generations.
I keep getting “Hardy–Weinberg principle” questions wrong in Evolution. What's the trap?
thinking allele frequencies always drift over time.
I keep getting “Natural selection” questions wrong in Evolution. What's the trap?
thinking organisms deliberately change their traits to adapt.
What is the difference between homologous organs and analogous organs?
Homologous organs share structure and ancestry but differ in function (human arm vs whale flipper); analogous organs share function but not ancestry (bird wing vs insect wing).
What does “Hardy-Weinberg principle” actually mean in Evolution, and why does it matter for NEET?
allele frequencies stay constant in a large, random-mating population with no mutation, migration, drift or selection.
What is the difference between natural selection and Lamarckism?
Natural selection acts on inherited variation over generations; Lamarckism (disproved) claimed traits acquired in life are passed on.
I keep getting “Hardy-Weinberg principle” questions wrong in Evolution. What's the trap?
thinking the equation means evolution has stopped everywhere.
What is the difference between divergent evolution and convergent evolution?
Divergent evolution makes related species differ (homologous organs); convergent evolution makes unrelated species resemble each other (analogous organs).
What is the difference between divergent evolution and convergent evolution?
Divergent evolution makes related species differ as they adapt to new niches (homologous organs, Darwin's finches); convergent evolution makes unrelated species resemble one another for the same function (analogous organs, insect and bird wings).
How is Evolution tested in NEET, and what should I focus on?
Prioritise the core ideas: Natural selection, Variation and adaptation, Hardy–Weinberg principle.
How is Evolution tested in NEET, and what should I focus on?
Prioritise the core ideas: Homologous vs analogous organs, Natural selection, Hardy-Weinberg principle.