Answer: Convection
Explanation: Cold water sinks because it is more dense than warm water.
Warm water rises because it is less dense than cold water.
Answer:
Human skulls have 22 bones: 8 cranial bones and 14 facial bones, according to the National Center for Biotechnology Information (NCBI).
Explanation:
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Answer:
HYDRA
Explanation:
The nerve cells are scattered in each layer of the body wall and these neurons send information from sensory organs. Based on the given choices above, the organism that has a nerve net that allows it to respond to a stimulus in a coordinated way is the HYDRA.
The digestive system is greatly affected by the irritation in the small intestine that occurs because of gallbladder disease.
Answer:
When the muscle cells can't get oxygen fast enough to meet their energy needs through aerobic respiration.
Explanation:
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