Select the correct statement form the following

Options

A. Mutations are random and directional
B. Darwinian variations are small and directionless
C. Fitness is end result of the ability to adapt and get selected by nature
D. All mammals excepts whales and camels have seven cervical vertebrae

Answer

To solve the question, we need to analyze each statement provided in the options and determine which one is correct based on our understanding of evolution and natural selection.

### Step-by-Step Solution:

1. **Analyze the first statement:**
- **Statement:** "Mutations are random and directional."
- **Analysis:** This statement is incorrect. Mutations are indeed random, but they are not directional. They occur without any specific direction or purpose, which means they can lead to various effects, some beneficial, some neutral, and some harmful.

**Hint:** Remember that mutations occur randomly and do not have a predetermined outcome.

2. **Analyze the second statement:**
- **Statement:** "Darwinian variations are small and directionless."
- **Analysis:** This statement is also incorrect. While Darwinian variations can be small, they are not directionless. They can lead to adaptations that are beneficial for survival, which implies a direction towards improving fitness.

**Hint:** Consider how variations contribute to the survival of species in changing environments.

3. **Analyze the third statement:**
- **Statement:** "Fitness is the end result of the ability to adapt and get selected by nature."
- **Analysis:** This statement is correct. In the context of Darwinian evolution, fitness refers to an organism's ability to survive and reproduce in its environment. The concept of natural selection suggests that those individuals who are better adapted to their environment will have a higher chance of survival and reproduction, thus increasing their fitness.

**Hint:** Think about how natural selection favors traits that enhance survival and reproduction.

4. **Analyze the fourth statement:**
- **Statement:** "All mammals except whales and camels have 7 cervical vertebrae."
- **Analysis:** This statement is incorrect. In fact, all mammals, including whales and camels, have 7 cervical vertebrae. The only exception is the sloth, which has a different number of cervical vertebrae.

**Hint:** Recall that the number of cervical vertebrae is generally consistent across mammals.

### Conclusion:
After analyzing all the statements, the correct answer is: **"Fitness is the end result of the ability to adapt and get selected by nature."**