Online Quiz # 03

1. What was the likely neck length of giraffes in the past?

A) Longer than modern giraffes
B) Shorter than modern giraffes
C) The same as modern giraffes
D) No neck at all

2. What environmental pressures contributed to the evolution of giraffes' long necks?

A) Drought and competition
B) Flood or forest fire damaging ground vegetation
C) Increase in predators
D) A change in climate making it colder

3. Why did giraffes with slightly longer necks survive better during the environmental crisis?

A) They could run faster
B) They could reach leaves higher up in trees
C) They were stronger
D) They had better vision

4. What process allowed giraffes with longer necks to pass this trait to future generations?

A) Migration
B) Natural selection
C) Cross-breeding
D) Artificial selection

5. What role did random mutations play in the giraffes' neck evolution?

A) They made giraffes taller instantly
B) They caused harmful changes
C) They led to new traits like slightly longer necks
D) They had no effect on neck length

6. What does "favorable traits" mean in the context of giraffe evolution?

A) Traits that cause extinction
B) Traits that help giraffes survive and reproduce
C) Traits that reduce giraffes' chance of survival
D) Traits that make giraffes smaller

7. Over time, how did the number of giraffes with longer necks change?

A) They became less common
B) They became more common
C) The number stayed the same
D) They disappeared completely

8. What is the term used to describe the process where advantageous traits become more common in a population?

A) Genetic drift
B) Natural selection
C) Mutation
D) Artificial selection

9. Which of the following best explains why giraffes evolved longer necks?

A) They needed to reach water sources
B) They needed to outrun predators
C) Environmental challenges made it necessary to access food in higher trees
D) They wanted to communicate better with other giraffes

10. How long did it take for giraffes to evolve the long necks we see today?

A) Over a few years
B) Over a few centuries
C) Over millions of years
D) Within one generation

11. In the context of genetic algorithms, what could be considered the "initial population" for giraffes' neck length?

A) A population of giraffes with varying neck lengths
B) Only the longest-necked giraffes
C) A population where all giraffes had the same neck length
D) A population of giraffes with no neck variation

12. In genetic algorithms, what role do environmental pressures (like a flood or forest fire) play?

A) They introduce random mutations into the population
B) They act as the fitness function, selecting individuals best suited for survival
C) They completely eliminate weaker traits
D) They create new traits out of nothing