Answer the following question given this paragraph: Water as a Component of Liquid Mixtures A mixture is a combination of two or more substances, each of which maintains its own chemical identity. In other words, the constituent substances are not chemically bonded into a new, larger chemical compound. The concept is easy to imagine if you think of powdery substances such as flour and sugar; when you stir them together in a bowl, they obviously do not bond to form a new compound. The room air you breathe is a gaseous mixture, containing three discrete elementsnitrogen, oxygen, and argonand one compound, carbon dioxide. There are three types of liquid mixtures, all of which contain water as a key component. These are solutions, colloids, and suspensions. Q: What describes a combination of two or more substances, each of which maintains its own chemical identity? Choices: - bond - structure - solute - mixture A:
mixture
(Question)
Answer the following question given this paragraph: Amphibian skin contains keratin, a protein that is also found in the outer covering of most other four-legged vertebrates. The keratin in amphibians is not too tough to allow gases and water to pass through their skin. Most amphibians breathe with gills as larvae and with lungs as adults. However, extra oxygen is absorbed through the skin. Q: Most amphibians breathe with these as larvae? Choices: - nostrils - lungs - pores - gills A:
(Answer)
gills
Ques: Answer the following question given this paragraph: The two major types of seed plants are the gymnosperms (seeds in cones) and angiosperms (seeds in ovaries of flowers). Figure below shows how the seeds of gymnosperms and angiosperms differ. Do you see the main difference between the two seeds? The angiosperm seed is surrounded by an ovary . Q: What are the two major types of seed plants called? Choices: - perennials and annuals - flowers and fruits - deciduous and evergreen - gymnosperms and angiosperms A:
Ans: gymnosperms and angiosperms
(Q).
Answer the following question given this paragraph: Old Faithful is the best-known geyser in the world. You can see a picture of it in Figure below . The geyser erupts faithfully every 90 minutes, day after day. During each eruption, it may release as much as 30,000 liters of water!. Q: What is the best-known geyser in the world that also faithfully erupts every 90 minutes? Choices: - devil's tongue - angel falls - old guy - old faithful A:
(A).
old faithful
Ques:Answer the following question given this paragraph: Neural Responses to Food In reaction to the smell, sight, or thought of food, like that shown in Figure 34.20, the first response is that of salivation. The salivary glands secrete more saliva in response to stimulation by the autonomic nervous system triggered by food in preparation for digestion. Simultaneously, the stomach begins to produce hydrochloric acid to digest the food. Recall that the peristaltic movements of the esophagus and other organs of the digestive tract are under the control of the brain. The brain prepares these muscles for movement as well. When the stomach is full, the part of the brain that detects satiety signals fullness. There are three overlapping phases of gastric controlthe cephalic phase, the gastric phase, and the intestinal phaseeach requires many enzymes and is under neural control as well. Q: What does the stomach produce to help digest food? Choices: - acetic acid - lactic acid - amino acid - hydrochloric acid A:

Ans:hydrochloric acid
Answer the following question given this paragraph: 29.4 Reptiles The amniotes are distinguished from amphibians by the presence of a terrestrially adapted egg protected by amniotic membranes. The amniotes include reptiles, birds, and mammals. The early amniotes diverged into two main lines soon after the first amniotes arose. The initial split was into synapsids (mammals) and sauropsids. Sauropsids can be further divided into anapsids (turtles) and diapsids (birds and reptiles). Reptiles are tetrapods either having four limbs or descending from such. Limbless reptiles (snakes) are classified as tetrapods, as they are descended from four-limbed organisms. One of the key adaptations that permitted reptiles to live on land was the development of scaly skin containing the protein keratin, which prevented water loss from the skin. Reptilia includes four living clades: Crocodilia (crocodiles and alligators), Sphenodontia (tuataras), Squamata (lizards and snakes), and Testudines (turtles). Q: The amniotes are distinguished from amphibians by the presence of a terrestrially adapted egg protected by what? Choices: - hard shell - yolk - albumen - amniotic membranes A:
amniotic membranes