The answer is A) An inner skeleton made of bone or cartilage. Vertebrates have a column of bones that supports the body and protects the spinal cord, while invertebrates are animals that either have a soft body or a hard outer casing covering their body.
Answer:
what website or book is that?
Answer: Volcanoes expel a mixture of gases consisting almost entirely of water vapor and oxygen
Volcanic eruptions are inversely proportional to local atmospheric pressure.
Explanation: I think
Answer:
Look at explanation
Explanation:
Genetic variation helps a species survive through environmental changes because some individuals can adapt to a changing environment. Genetic variation allows more variations within phenotypes.
