Answer:
spider with second option (spiders have an open circulatory system.)
earthworm with first option
starfish with forth option
Explanation:
Is caused by vibration, can travel through a vacum, and travels in longitudinal waves<span />
Answer:
Juvenile rheumatoid arthritis
Explanation:
Arthritis is a term used to refer a group of diseases that affects the joints such as knees, wrists and fingers.
Juvenile rheumatoid Arthritis is an autoimmune disorder that affects children which means the body attacks itself by mistakenly identifying its own cells as foreign .
The cause of this response is not yet known.
Some of the symptoms of the disease include stiffness, pain, joint swelling, skin rush, fever, slowed growth and fatigue.
It has no cure but in some cases children seem to outgrow the disease.
Octopus are invertebrates
