Q: Concentration of what, the substance left behind when ocean water evaporates, is about 3.5 percent? Read this paragraph and choose the correct option from the provided answers: Dissolved mineral salts wash into the ocean. As ocean water evaporates, it leaves the salts behind. This makes the water saltier. Ocean water is about 3.5 percent salts. The main salt is sodium chloride. Choices: - hydrogen - sugar - quartz - salts A:
salts

Q: Some consumers such as the mushroom get their energy from what? Read this paragraph and choose the correct option from the provided answers: Some consumers such as the mushroom in Figure above get their energy from dead organic matter. For example, they might consume dead leaves on a forest floor. Choices: - inorganic matter - solar energy - minerals - dead organic matter A:
dead organic matter

Q: Q: The three greatest proximate threats to biodiversity are habitat loss, overharvesting, and introduction of what? Read this paragraph and choose the correct option from the provided answers: 21.2 | Threats to Biodiversity By the end of this section, you will be able to: Identify significant threats to biodiversity Explain the effects of habitat loss, exotic species, and hunting on biodiversity Identify the early and predicted effects of climate change on biodiversity The core threat to biodiversity on the planet, and therefore a threat to human welfare, is the combination of human population growth and the resources used by that population. The human population requires resources to survive and grow, and those resources are being removed unsustainably from the environment. The three greatest proximate threats to biodiversity are habitat loss, overharvesting, and introduction of exotic species. The first two of these are a direct result of human population growth and resource use. The third results from increased mobility and trade. A fourth major cause of extinction, anthropogenic (human-caused) climate change, has not yet had a large impact, but it is predicted to become significant during this century. Global climate change is also a consequence of human population needs for energy and the use of fossil fuels to meet those needs (Figure 21.7). Environmental issues, such as toxic pollution, have specific targeted effects on species, but are not generally seen as threats at the magnitude of the others. Choices: - solar radiation - carbon dioxide - carbon monoxide - exotic species A:
A: exotic species

Question: Q: When boron10 absorbs a neutron, what does it emit? Read this paragraph and choose the correct option from the provided answers: Boron neutron capture therapy is a potential treatment for many diseases. As the name implies, when boron10, one of the naturally occurring isotopes of boron, is bombarded with neutrons, it absorbs a neutron and emits an particle. Write a balanced nuclear reaction for this reaction. One advantage of this process is that neutrons cause little damage on their own, but when they are absorbed by boron-10, they can cause localized emission of alpha radiation. Comment on the utility of this treatment and its potential difficulties. Choices: - calcium - light - proteins - particle A:
Answer: particle

*Question*
Q: What two phases does the cell cycle consist of? Read this paragraph and choose the correct option from the provided answers: 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. Choices: - antecedent and mitotic - mitosis and mitotic - outerphase and mitotic - interphase and mitotic A:
**Answer**
interphase and mitotic

(Question)
Q: What is the modern periodic table based on? Read this paragraph and choose the correct option from the provided answers: The modern periodic table is based on atomic number. Elements in each period go from metals on the left to metalloids and then nonmetals on the right. Within groups, elements have similar properties. Choices: - element mass - metallic number - element density - atomic number A:
(Answer)
atomic number