Problem: OPTIONS:
- hair
- warm blood
- laying eggs
- backbone
Q: Q: Vertebrates. from the smallest of fish to us. one of the main features we all have in common is our what? A:
Answer: backbone

Problem:OPTIONS:
- electromagnetic
- gravity
- fluid
- mechanical

Q: What type of digestion is chewing an example of? A:
****
A: mechanical

Q: Diagnosing and treating cancer is a beneficial use of what potentially dangerous energy? A:
OPTIONS:
- thermal
- mechanical
- solar
- radiation
radiation

Q: What chemical substances are secreted by animals that communicate by odor or taste? A:
OPTIONS:
- alaki
- hormones
- acids
- pheromones

Answer: pheromones

Question: Q: What is the star-like structure inside the paramecia? A:
OPTIONS:
- the reflex vacuole
- the elongated vacuole
- the bare vacuole
- the contractile vacuole
Answer: the contractile vacuole

input: OPTIONS:
- six
- three
- Ten
- four Now, answer this question: Q: How many types of tissue are found in animals? A:
A:
output:
four