Forelimbs of whale bat, cheetah and human do not show-
a. Similarities in the pattern of bones
b. Adaptive radiation
c. Analogous organs
d. Convergent evolution
e. Divergent evolution
f. Different structures evolving for same functions

Options

A. a,b and c
B. c,d and f
C. a and d
D. a,b and c

Answer

To solve the question regarding the forelimbs of whales, bats, cheetahs, and humans, we need to analyze the options provided and understand the concepts of homologous and analogous organs, as well as the types of evolution involved.

### Step-by-Step Solution:

1. **Understanding Homologous Organs**:
- The forelimbs of whales, bats, cheetahs, and humans are considered homologous organs. This means they share a common structural pattern due to a shared ancestor, despite performing different functions.

2. **Analyzing the Options**:
- **a. Similarities in the pattern of bones**: This is incorrect because these forelimbs do show similarities in bone structure (e.g., humerus, radius, ulna).
- **b. Adaptive radiation**: This is also incorrect. Adaptive radiation occurs when different species evolve from a common ancestor due to different environmental pressures, which is applicable here.
- **c. Analogous organs**: This is correct. The forelimbs do not show analogous organs since analogous organs arise from convergent evolution, where different structures evolve to perform similar functions.
- **d. Convergent evolution**: This is correct. The forelimbs do not exhibit convergent evolution, as they are homologous and derived from a common ancestor.
- **e. Divergent evolution**: This is incorrect. The forelimbs are a result of divergent evolution, as they have evolved from a common ancestor.
- **f. Different structures evolving for the same functions**: This is correct. The forelimbs do not show this characteristic, as they have similar structures but serve different functions.

3. **Conclusion**:
- The forelimbs of whales, bats, cheetahs, and humans do not show **c. Analogous organs**, **d. Convergent evolution**, and **f. Different structures evolving for the same functions**.

### Final Answer:
The correct options that the forelimbs do not show are **c, d, and f**.

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