Answer the following question given this paragraph: The smallest particle of an element that still has the element's properties is an atom . All the atoms of an element are alike, and they are different from the atoms of all other elements. For example, atoms of gold are the same whether they are found in a gold nugget or a gold ring (see Figure below ). All gold atoms have the same structure and properties. Q: What is the smallest particle of an element that still has the element's properties? Choices: - an ion - a nucleus - an electron - an atom A:
an atom
Answer the following question given this paragraph: Within seconds of birth, the umbilical cord is cut. Without this connection to the placenta, the baby can't exchange gases, so carbon dioxide quickly builds up in the baby's blood. This stimulates the baby's brain to trigger breathing, and the newborn takes her first breath. Q: What structure connects the fetus to the placenta, allowing the exchange of gases? Choices: - sediment cord - skin cord - belly button - umbilical cord A:
umbilical cord
Q: Answer the following question given this paragraph: The organ systems of the body work together to carry out life processes and maintain homeostasis. Q: The organ systems of the body work together to carry out life processes and maintain what? Choices: - movement - freshness - consciousness - homeostasis A:
A: homeostasis
Question: Answer the following question given this paragraph: Q: All three axes are established before the zygote begins to undergo what? Choices: - cloning - birth - twinning - cleavage A:
Answer: cleavage
*Question*
Answer the following question given this paragraph: The placenta is a spongy structure. It consists of membranes and blood vessels from both mother and embryo (see Figure below ). The placenta passes oxygen, nutrients, and other useful substances from the mother to the fetus. It also passes carbon dioxide and other wastes from the fetus to the mother. The placenta lets blood from the fetus and mother exchange substances without actually mixing. Thus, it protects the fetus from being attacked by the mother's immune system as a "foreign parasite. ". Q: Designed to exchange materials, what spongy structure consists of membranes and blood vessels from both mother and embryo? Choices: - endometrium - uterus - umbilicus - placenta A:
**Answer**
placenta
Answer the following question given this paragraph: Millions of acres of forest have been cut and burned to make way for farming. Figure below shows an example. Burning trees produces most of the same pollutants as burning fossil fuels. Q: Burning trees produces most of the same pollutants as burning what? Choices: - fossil compounds - carbon - coal fuels - fossil fuels A:
fossil fuels