Evolution

State the basic concept of Oparin and Haldane's theory regarding the origin of life.

What are homologous organs? Give one suitable example.

Briefly explain Darwin's theory of natural selection.

What is meant by adaptive radiation? Give an example.

Differentiate between divergent and convergent evolution.

What is the Hardy-Weinberg principle?

Who conducted the famous experiment to test Miller and Urey's hypothesis on chemical evolution?

Differentiate between homologous and analogous organs with suitable examples. Explain how they provide evidence for evolution.

In a random mating population of 1000 individuals, 360 belong to genotype $AA$, 480 to genotype $Aa$, and the remaining 160 to genotype $aa$. Calculate the allele frequencies of allele $A$ and allele $a$. Does this population satisfy the Hardy-Weinberg equilibrium? Show step-by-step calculations.

Describe the Miller-Urey experiment. What was its main hypothesis and what conclusion was drawn from its results regarding the origin of life?

Explain Industrial Melanism in the peppered moth (Biston betularia) as an example of natural selection in action.

Trace the key trends in human evolution from Australopithecus to Homo erectus, highlighting changes in cranial capacity, posture, and tool usage.

What is Adaptive Radiation? Explain this process with two classic biological examples.

State the Hardy-Weinberg Principle. List five factors known to disturb Hardy-Weinberg genetic equilibrium.

Describe the Miller-Urey Experiment. How did its observations support the theory of chemical evolution of life?

In a stable population in Hardy-Weinberg equilibrium, 16% of the individuals display a recessive trait ($aa$). Calculate:

1. The allele frequencies of the recessive allele ($a$) and the dominant allele ($A$).
2. The percentage of the population expected to be heterozygous ($Aa$).
3. The percentage of the population expected to be homozygous dominant ($AA$).

Question 1

(a) State the Hardy-Weinberg Principle and write its mathematical equation. (b) Solve the following numerical problem:\nIn a random mating population of $1000$ individuals, $360$ belong to genotype $AA$, $480$ to $Aa$, and $160$ to $aa$.

1. Calculate the frequency of allele $A$ and allele $a$.
2. Verify if the population is in Hardy-Weinberg equilibrium.

Question 2

(a) Define Adaptive Radiation. Explain it with the help of two suitable examples. (b) Differentiate between Homologous organs and Analogous organs with suitable examples, highlighting how they support the concept of biological evolution.

State the Hardy-Weinberg Principle. In a stable, randomly-mating population of 1000 individuals, 360 individuals display the recessive phenotype caused by a homozygous recessive genotype ($aa$). Assuming the population is in Hardy-Weinberg equilibrium, calculate:

1. The frequency of the recessive allele ($a$) and the dominant allele ($A$).
2. The expected number of homozygous dominant ($AA$) and heterozygous ($Aa$) individuals in the population.
3. State three key factors that can disturb Hardy-Weinberg equilibrium in a natural population.

Explain the comparative anatomical evidence for biological evolution by comparing Homologous and Analogous organs with suitable examples. Also, explain the concept of Adaptive Radiation with a suitable example.

State and explain the Hardy-Weinberg Principle. List the five factors that affect the Hardy-Weinberg equilibrium.

Numerical Problem:\nIn a population of 1000 individuals, 360 belong to genotype AA, 480 to Aa, and 160 to aa. Calculate the allele frequencies of allele 'A' and allele 'a'. Verify whether this population is in Hardy-Weinberg equilibrium.