Fitness Unit 3.7 AP Bio 1

What does fitness describe in biological terms?

• How fast an organism can run
• How intelligent an organism is
• An organism’s ability to survive and reproduce
• The amount of food an organism eats

Why does the taller giraffe have higher fitness?

• It runs faster
• It can reach more food and reproduce more
• It looks more attractive
• It has a better immune system

In a dark environment, which mice have higher fitness?

• White mice
• Gray mice
• Black mice
• All mice equally

What causes the flower color variation in pea plants?

• Soil type
• A gene called B
• Water availability
• Plant age

What happens when a protein is non-functional due to a mutation?

• It becomes stronger
• It produces more pigment
• It cannot complete its function
• It mutates back to normal

Why might white flowers have lower fitness in some environments?

• They grow slower
• They repel bees
• Bees prefer purple flowers
• They have more mutations

What directly affects the traits in an organism?

• Its diet
• Its age
• Its DNA
• Its behavior

What do antibiotics target in bacterial cells?

• Cell walls
• Ribosomes
• Nucleus
• DNA replication

How do bacteria develop antibiotic resistance?

• They hide from antibiotics
• They become more aggressive
• They mutate
• They stop reproducing

What does natural selection lead to?

• Random population changes
• Decreased diversity
• Changes in populations based on fitness
• Faster evolution