Answer the following question given this paragraph: Even if you don't live in a place where leaves turn color in the fall, no doubt you've seen photos of their "fall colors" (see Figure below ). The leaves of many plants turn from green to other, glorious colors during autumn each year. The change is triggered by shorter days and cooler temperatures. Leaves respond to these environmental stimuli by producing less chlorophyll . This allows other leaf pigmentssuch as oranges and yellowsto be seen. Q: When plants lose their leaves in the fall, what chemical is produced less to cause the change? Choices: - pheromes - carbonate - oxygen - chlorophyll A:
chlorophyll
Answer the following question given this paragraph: Atomic radius is determined as the distance between the nuclei of two identical atoms bonded together. Q: What is the distance between the nuclei of two identical atoms bonded together called? Choices: - cycle radius - bond radius - sleep radius - atomic radius A:
atomic radius
Q: Answer the following question given this paragraph: Figure 10.5 The cell cycle consists of interphase and the mitotic phase. During interphase, the cell grows and the nuclear DNA is duplicated. Interphase is followed by the mitotic phase. During the mitotic phase, the duplicated chromosomes are segregated and distributed into daughter nuclei. The cytoplasm is usually divided as well, resulting in two daughter cells. Q: What two phases does the cell cycle consist of? Choices: - antecedent and mitotic - mitosis and mitotic - outerphase and mitotic - interphase and mitotic A:
A: interphase and mitotic
Question: Answer the following question given this paragraph: The number of protons in an atom is called its atomic number. This is also unique for each element. Q: The atomic number is the same as the number of what in an atom? Choices: - neutrons - ions - electrons - protons A:
Answer: protons
*Question*
Answer the following question given this paragraph: 18.1 How Animals Reproduce Reproduction may be asexual when one individual produces genetically identical offspring, or sexual when the genetic material from two individuals is combined to produce genetically diverse offspring. Asexual reproduction in animals occurs through fission, budding, fragmentation, and parthenogenesis. Sexual reproduction may involve fertilization inside the body or in the external environment. A species may have separate sexes or combined sexes; when the sexes are combined they may be expressed at different times in the life cycle. The sex of an individual may be determined by various chromosomal systems or environmental factors such as temperature. Sexual reproduction starts with the combination of a sperm and an egg in a process called fertilization. This can occur either outside the bodies or inside the female. The method of fertilization varies among animals. Some species release the egg and sperm into the environment, some species retain the egg and receive the sperm into the female body and then expel the developing embryo covered with shell, while still other species retain the developing offspring throughout the gestation period. Q: What type of reproduction begins when an egg and sperm combine? Choices: - natural reproduction - regular reproduction - asexual reproduction - sexual reproduction A:
**Answer**
sexual reproduction
(Q).
Answer the following question given this paragraph: The melting point of a substance is the temperature that separates a solid and a liquid. The boiling point of a substance is the temperature that separates a liquid and a gas. What accounts for this variability? Why do some substances become liquids at very low temperatures, while others require very high temperatures before they become liquids? It all depends on the strength of the intermolecular interactions between the particles of substances. (Although ionic compounds are not composed of discrete molecules, we will still use the term intermolecular to include interactions between the ions in such compounds. ) Substances that experience strong intermolecular interactions require higher temperatures to become liquids and, finally, gases. Substances that experience weak intermolecular interactions do not need much energy (as measured by Saylor URL: http://www. saylor. org/books. Q: Melting points are temperatures that are high enough to separate liquids from which substances? Choices: - gases - seeds - oils - solids A:
(A).
solids