Q: The unpaired ethmoid bone is located where within the central skull? Choices: - at the top - at the point - at the fold - at the midline A:
at the midline

Q: In vertebrates, a system of what structures attached to the endoskeleton enables movement? Choices: - nerves - tendons - tissues - muscles A:
muscles

Q: Q: The central nervous system is composed of the brain and what else? Choices: - the sclerotic cord - the dynamic cord - the lateral cord - the spinal cord A:
A: the spinal cord

Question: Q: What kind of current flows in just one direction? Choices: - physical current - slow current - Alternating current - direct current A:
Answer: direct current

*Question*
Q: What sustains the fetus while it grows inside the mother's uterus? Choices: - bacteria - endometrium - mitochondria - placenta A:
**Answer**
placenta

Q: Q: The uterus has an external opening known as what? Choices: - cervix - ovaries - fallopian tubes - vulva A:
A: vulva