Answer the following question given this paragraph: Macroevolution is evolution over geologic time above the level of the species. One of the main topics in macroevolution is how new species arise. The process by which a new species evolves is called speciation . How does speciation occur? How does one species evolve into two or more new species?. Q: What is the term for evolution over geologic time above the level of the species? Choices: - mutation - speciation - microevolution - macroevolution A:
macroevolution
Answer the following question given this paragraph: Electron Configurations and the Periodic Table As described earlier, the periodic table arranges atoms based on increasing atomic number so that elements with the same chemical properties recur periodically. When their electron configurations are added to the table (Figure 6.30), we also see a periodic recurrence of similar electron configurations in the outer shells of these elements. Because they are in the outer shells of an atom, valence electrons play the most important role in chemical reactions. The outer electrons have the highest energy of the electrons in an atom and are most easily lost or shared than the core electrons. Valence electrons are also the determining factor in some physical properties of the elements. Elements in any one group (or column) have the same number of valence electrons; the alkali metals lithium and sodium each have only one valence electron, the alkaline earth metals beryllium and magnesium each have two, and the halogens fluorine and chlorine each have seven valence electrons. The similarity in chemical properties among. Q: Which type of electrons plays the most important role in chemical reactions? Choices: - noncovalent - intermediate - transition - valence A:
valence
Q: Answer the following question given this paragraph: Human organ systems work together to carry out many of their functions. The skeletal and muscular systems are no exception. Q: Groupings of related organs in the human body are referred to as "organ" what? Choices: - conditions - bodies - functions - systems A:
A: systems
Question: Answer the following question given this paragraph: Adolescence is the period of transition between the beginning of puberty and adulthood. Adolescence is also a time of significant mental, emotional, and social changes. For example:. Q: What is the name of the period of transition between the beginning of puberty and adulthood? Choices: - maturation - aging - childhood - adolescence A:
Answer: adolescence
*Question*
Answer the following question given this paragraph: The earliest fungi may have evolved about 600 million years ago. Q: How many years ago may the earliest fungi have evolved? Choices: - .350 million - 500 million - .250 million - 600 million A:
**Answer**
600 million
Q: Answer the following question given this paragraph: A mature sporophyte fern has the familiar leafy fronds. The undersides of the leaves are dotted with clusters of sporangia. Sporangia produce spores that develop into tiny, heart-shaped gametophytes. Gametophytes have antheridia and archegonia. Antheridia produce sperm with many cilia; archegonia produce eggs. Fertilization occurs when sperm swim to an egg inside an archegonium. The resulting zygote develops into an embryo that becomes a new sporophyte plant. Then the cycle repeats. Q: Sporangia produce spores that develop into tiny, heart-shaped what? Choices: - cells - tubules - filaments - gametophytes A:
A: gametophytes