Answer the following question given this paragraph: Heart: Coronary Artery Disease Coronary artery disease is the leading cause of death worldwide. It occurs when the buildup of plaquea fatty material including cholesterol, connective tissue, white blood cells, and some smooth muscle cellswithin the walls of the arteries obstructs the flow of blood and decreases the flexibility or compliance of the vessels. This condition is called atherosclerosis, a hardening of the arteries that involves the accumulation of plaque. As the coronary blood vessels become occluded, the flow of blood to the tissues will be restricted, a condition called ischemia that causes the cells to receive insufficient amounts of oxygen, called hypoxia. Figure 19.16 shows the blockage of coronary arteries highlighted by the injection of dye. Some individuals with coronary artery disease report pain radiating from the chest called angina pectoris, but others remain asymptomatic. If untreated, coronary artery disease can lead to MI or a heart attack. Q: What is the leading cause of death worldwide? Choices: - lung disease - cancer - liver failure - coronary artery disease A:
coronary artery disease
Answer the following question given this paragraph: In the oceans, plates move apart at mid-ocean ridges. Lava rises upward, erupts, and cools. Later, more lava erupts and pushes the original seafloor outward. This is seafloor spreading. Seafloor spreading forms new oceanic crust. The rising magma causes the ridge to be buoyant. This is why there is a mountain range running through the oceans. The plates pulling apart cause earthquakes. Q: What forms in the ocean from the seafloor spreading? Choices: - underwater volcanoes - tsunamis - earthquakes - new oceanic crust A:
new oceanic crust
Q: Answer the following question given this paragraph: Commensalism is a symbiotic relationship in which one species benefits while the other species is not affected. An example is the relationship between birds called cattle egrets and cattle (see Figure below ). Cattle egrets feed on insects. They follow cattle herds around to take advantage of the insects stirred up by the feet of the cattle. The egrets get ready access to food from the relationship, whereas the cattle are not affected. Q: What is the term for a symbiotic relationship in which one species benefits while the other species is not affected? Choices: - parasitism - mutualism - pollenation - commensalism A:
A: commensalism
Question: Answer the following question given this paragraph: Natural selection for a polygenic trait changes the distribution of phenotypes. It may have a stabilizing, directional, or disruptive effect on the phenotype distribution. Q: Natural selection for what type of trait changes the distribution of phenotypes? Choices: - parent trait - major trait - maladaptive trait - polygenic trait A:
Answer: polygenic trait
*Question*
Answer the following question given this paragraph: If you are a girl and use tampons, be sure to change them every four to six hours. Leaving tampons in for too long can put you at risk of toxic shock syndrome . This is a serious condition. Signs and symptoms of toxic shock syndrome develop suddenly, and the disease can be fatal. The disease involves fever, shock, and problems with the function of several body organs. Q: Leaving tampons in for too long can put you at risk of what syndrome? Choices: - Vaginismis - Endometrial Cancer - Scalded Skin Syndrome - toxic shock A:
**Answer**
toxic shock
*Question*
Answer the following question given this paragraph: Evolution is a change in the characteristics of living things over time. As described by Darwin, evolution occurs by a process called natural selection . In natural selection, some members of a species, being better adapted or suited to their environment, produce more offspring than others, so they pass "advantageous traits" to their offspring. Over many generations, this can lead to major changes in the characteristics of the species. Evolution explains how living things are changing today and how modern living things have descended from ancient life forms that no longer exist on Earth. As living things evolve, they generally become better suited for their environment. This is because they evolve adaptations. An adaptation is a trait that helps an organism survive and reproduce in a given environment. Q: Evolution occurs by what process whereby better-adapted members pass along their traits, according to darwin? Choices: - organic selection - natural change - spontaneous variation - natural selection A:
**Answer**
natural selection