Answer the following question given this paragraph: The Pharynx The pharynx (throat) is involved in both digestion and respiration. It receives food and air from the mouth, and air from the nasal cavities. When food enters the pharynx, involuntary muscle contractions close off the air passageways. A short tube of skeletal muscle lined with a mucous membrane, the pharynx runs from the posterior oral and nasal cavities to the opening of the esophagus and larynx. It has three subdivisions. The most superior, the nasopharynx, is involved only in breathing and speech. The other two subdivisions, the oropharynx and the laryngopharynx, are used for both breathing and digestion. The oropharynx begins inferior to the nasopharynx and is continuous below with the laryngopharynx (Figure 23.12). The inferior border of the laryngopharynx connects to the esophagus, whereas the anterior portion connects to the larynx, allowing air to flow into the bronchial tree. Q: Digestion and respiration are both facilitated by the pharynx, more commonly called the what? Choices: - esophagus - sinus - nose - throat A:
throat
(Question)
Answer the following question given this paragraph: Scientists do the same thing when they classify , or put into categories, living things. Scientists classify organisms not only by their physical features, but also by how closely related they are. Lions and tigers look like each other more than they look like bears, but are lions and tigers related? Evolutionarily speaking, yes. Evolution is the change in a species over time. Lions and tigers both evolved from a common ancestor. So it turns out that the two cats are actually more closely related to each other than to bears. How an organism looks and how it is related to other organisms determines how it is classified. Q: What is the change in a species over time? Choices: - variation - phenomenon - transformation - evolution A:
(Answer)
evolution
Ques: Answer the following question given this paragraph: In vascular plants, the sporophyte generation is dominant. Q: In vascular plants, the sporophyte generation is what? Choices: - non-existant - submissive - resting - dominant A:
Ans: dominant
(Q).
Answer the following question given this paragraph: Calsidyrose. The needle of a compass is made of the element iron . CC BY 2.0. Q: The needle of a compass is made of what element? Choices: - tin - aluminum - nickel - iron A:
(A).
iron
Ques:Answer the following question given this paragraph: CHAPTER SUMMARY 11.1 Discovering How Populations Change Evolution by natural selection arises from three conditions: individuals within a species vary, some of those variations are heritable, and organisms have more offspring than resources can support. The consequence is that individuals with relatively advantageous variations will be more likely to survive and have higher reproductive rates than those individuals with different traits. The advantageous traits will be passed on to offspring in greater proportion. Thus, the trait will have higher representation in the next and subsequent generations leading to genetic change in the population. The modern synthesis of evolutionary theory grew out of the reconciliation of Darwin's, Wallace's, and Mendel's thoughts on evolution and heredity. Population genetics is a theoretical framework for describing evolutionary change in populations through the change in allele frequencies. Population genetics defines evolution as a change in allele frequency over generations. In the absence of evolutionary forces allele frequencies will not change in a population; this is known as Hardy-Weinberg equilibrium principle. However, in all populations, mutation, natural selection, genetic drift, and migration act to change allele frequencies. Q: What is the term for a theoretical framework for describing evolutionary change in populations through the change in allele frequencies? Choices: - percent genetics - density genetics - total genetics - population genetics A:

Ans:population genetics
Answer the following question given this paragraph: The Sun is Earth's main source of energy. The Sun gives us both light and heat. The Sun changes hydrogen into helium through nuclear fusion. This releases huge amounts of energy. The energy travels to Earth mostly as visible light. The energy is carried through the empty space by radiation . We can use sunlight as an energy resource, called solar energy. Q: What celestial body is the earth's main source of energy? Choices: - rivers - ocean - moon - sun A:
sun