Q: What is already causing food and water shortages and species extinctions? Read this paragraph and choose the correct option from the provided answers: Adding more heat energy to Earth's atmosphere also causes more extreme weather and changes in precipitation patterns. Global warming is already causing food and water shortages and species extinctions. These problems will only grow worse unless steps are taken to curb greenhouse gases and global climate change. Choices: - urbanization - immigration - zero population growth - global warming A:
global warming

(Question)
Q: Do most humans feed at one trophic level, or more than one? Read this paragraph and choose the correct option from the provided answers: Many consumers feed at more than one trophic level. Humans, for example, are primary consumers when they eat plants such as vegetables. They are secondary consumers when they eat cows. They are tertiary consumers when they eat salmon. Choices: - less than one - one - none - more than one A:
(Answer)
more than one

Ques: Q: Mitosis and meiosis are both forms of division of the nucleus in these? Read this paragraph and choose the correct option from the provided answers: Comparing Meiosis and Mitosis Mitosis and meiosis are both forms of division of the nucleus in eukaryotic cells. They share some similarities, but also exhibit distinct differences that lead to very different outcomes (Figure 11.7). Mitosis is a single nuclear division that results in two nuclei that are usually partitioned into two new cells. The nuclei resulting from a mitotic division are genetically identical to the original nucleus. They have the same number of sets of chromosomes, one set in the case of haploid cells and two sets in the case of diploid cells. In most plants and all animal species, it is typically diploid cells that undergo mitosis to form new diploid cells. In contrast, meiosis consists of two nuclear divisions resulting in four nuclei that are usually partitioned into four new cells. The nuclei resulting from meiosis are not genetically identical and they contain one chromosome set only. This is half the number of chromosome sets in the original cell, which is diploid. Choices: - converts cells - endogenous cells - reproduction cells - eukaryotic cells A:
Ans: eukaryotic cells

(Q).
Q: What do cells produce as they age? Read this paragraph and choose the correct option from the provided answers: Choices: - carcinogens - wrinkles - oxidants - proto-oncogenes A:
(A).
proto-oncogenes

Ques:Q: Lava erupts through long cracks in the ground, also called what? Read this paragraph and choose the correct option from the provided answers: At divergent plate boundaries hot mantle rock rises into the space where the plates are moving apart. As the hot mantle rock rises, it goes from higher to lower pressure. This is because there is no longer the weight of all the rock above it. Lower pressure lowers the melting temperature of the rock (2 in the previous section). This is why there is volcanism at divergent plate boundaries. Lava erupts through long cracks in the ground, or fissures. Choices: - ridges - crevasses - faults - fissures A:

Ans:fissures

Question: Q: Because alkali metals are so reactive, they are found in nature only in ________ with other elements? Read this paragraph and choose the correct option from the provided answers: Hydrogen is a very reactive gas, and the alkali metals are even more reactive. In fact, they are the most reactive metals and, along with the elements in group 17, are the most reactive of all elements. The reactivity of alkali metals increases from the top to the bottom of the group, so lithium (Li) is the least reactive alkali metal and francium (Fr) is the most reactive. Because alkali metals are so reactive, they are found in nature only in combination with other elements. They often combine with group 17 elements, which are very "eager" to gain an electron. At the URL below, you can watch a video that shows just how reactive the alkali metals are. Choices: - isolation - cooperation - competition - combination A:
Answer:
combination