Problem:OPTIONS:
- becomes calcium
- gains a proton
- combines with hydrogen
- becomes sodium ion

Answer the following question given this paragraph: By losing an electron, the sodium atom becomes a sodium ion. It now has one less electron than protons, giving it a charge of +1. Positive ions such as sodium are given the same name as the element. The chemical symbol has a plus sign to distinguish the ion from an atom of the element. The symbol for a sodium ion is Na + . Q: What happens when a sodium atom loses an electron? A:
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A: becomes sodium ion

Problem:OPTIONS:
- dominant
- fatal
- adaptive
- sex-linked

Answer the following question given this paragraph: One example of a sex-linked trait is red-green colorblindness. People with this type of colorblindness cannot tell the difference between red and green. They often see these colors as shades of brown ( Figure below ). Boys are much more likely to be colorblind than girls ( Table below ). This is because colorblindness is a sex-linked, recessive trait. Q: Red-green colorblindness is an example of what kind of trait? A:
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A: sex-linked

Problem:OPTIONS:
- animals
- roots
- decomposers
- plants

Answer the following question given this paragraph: heterotroph that eats only or mainly plants. Q: The heterotroph eats only or mainly what? A:
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A: plants

Problem:OPTIONS:
- diverse factors
- nucleic factors
- Dead factors
- abiotic factors

Answer the following question given this paragraph: Abiotic factors are the nonliving parts of ecosystems. They include air, sunlight, soil, water, and minerals. These are all things that are needed for life. They determine which living things and how many of them an ecosystem can support. Figure below shows an ecosystem and its abiotic factors. Q: What is the name for the nonliving parts of ecosystems? A:
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A:
abiotic factors