Problem: OPTIONS:
- hip socket
- meniscus
- femur joint
- hip joint
Q: Q: What is the joint where the pelvic girdle and leg come together? A:
Answer: hip joint

Problem:OPTIONS:
- paradox species
- symbiotic species
- complement species
- keystone species

Q: What do you call a predator species that affects other species' populations when its own population size changes? A:
****
A: keystone species

Q: When bacteria are destroyed by leukocytes, what are released into the blood? A:
OPTIONS:
- carcinogens
- proteins
- sporozoans
- pyrogens
pyrogens

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

Answer: pheromones

Question: Q: Endotherms are warmed mostly by heat generated by what? A:
OPTIONS:
- movement
- electricity
- the sun
- metabolism
Answer: metabolism

input: OPTIONS:
- sea floor
- sand
- beaches
- reef or rock Now, answer this question: Q: Where are sponges most likely anchored to? A:
A:
output:
reef or rock