Answer the following question given this paragraph: The color of a material is due to the ability of its atoms to absorb certain wavelengths while reflecting or reemitting others. A simple red material, for example a tomato, absorbs all visible wavelengths except red. This is because the atoms of its hydrocarbon pigment (lycopene) have levels separated by a variety of energies corresponding to all visible photon energies except red. Air is another interesting example. It is transparent to visible light, because there are few energy levels that visible photons can excite in air molecules and atoms. Visible light, thus, cannot be absorbed. Furthermore, visible light is only weakly scattered by air, because visible wavelengths are so much greater than the sizes of the air molecules and atoms. Light must pass through kilometers of air to scatter enough to cause red sunsets and blue skies. Q: What weakly scatters visible light? Choices: - space - Reflection - water - air A:
air
Answer the following question given this paragraph: Cumulus clouds are white and puffy. Convection currents make them grow upward, and they may grow very tall. When they produce rain, they are called cumulonimbus. Q: What color and shape are cumulus clouds? Choices: - white and wispy - dark and tall - dark and wispy - white and puffy A:
white and puffy
Q: Answer the following question given this paragraph: As expected, the entropy values for solids are low, the values for gases are high, and the ones for liquids are intermediate. Another observation can be made by looking at the three hydrocarbon gases at the end of the table. For similar molecules, a higher molecular weight generally leads to a larger standard entropy value. Although this is a drastic oversimplification, we can think of this in terms of the electrons that make up each molecule. A larger molecular weight generally means more protons, which also means more electrons. There are more ways to arrange a large number of electrons within a molecule than there are to arrange a smaller number. Although these arrangements are heavily constrained by the positions of the various nuclei, there is still an overall trend for larger molecules to have higher entropy values. Q: Which state of matter has an intermediate level of entropy between solid and gas? Choices: - plasma - water - metal - liquid A:
A: liquid
Question: Answer the following question given this paragraph: Fertilization Fertilization, pictured in Figure 43.23a is the process in which gametes (an egg and sperm) fuse to form a zygote. The egg and sperm each contain one set of chromosomes. To ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg. In mammals, the egg is protected by a layer of extracellular matrix consisting mainly of glycoproteins called the zona pellucida. When a sperm binds to the zona pellucida, a series of biochemical events, called the acrosomal reactions, take place. In placental mammals, the acrosome contains digestive enzymes that initiate the degradation of the glycoprotein matrix protecting the egg and allowing the sperm plasma. Q: In mammals what does the zona pellucida protect? Choices: - testes - sperm - fetus - egg A:
Answer: egg
*Question*
Answer the following question given this paragraph: This timeline shows the history of life on Earth. In the entire span of the time, humans are a relatively new addition. Q: Are humans a new or old species on the earth? Choices: - primal - old - extinct - new A:
**Answer**
new
(Question)
Answer the following question given this paragraph: Mitosis , or division of the nucleus, occurs only in eukaryotic cells. By the time mitosis occurs, the cell's DNA has already replicated. Mitosis occurs in four phases, called prophase, metaphase, anaphase, and telophase. You can see what happens in each phase in Figure below . The phases are described below. You can also learn more about the phases of mitosis by watching this video: https://www. youtube. com/watch?v=gwcwSZIfKlM . Q: Eukaryotic cells undergo what kinds of divisions that more primitive cells do not? Choices: - budding - meiosis - homologous - mitosis A:
(Answer)
mitosis