Answer the following question given this paragraph: Osmotic pressure is important in biological systems because cell walls are semipermeable membranes. In particular, when a person is receiving intravenous (IV) fluids, the osmotic pressure of the fluid needs to be approximately the same as blood serum; otherwise bad things can happen. Figure 11.4 "Osmotic Pressure and Red Blood Cells" shows three red blood cells: Figure 11.4 "Osmotic Pressure and Red Blood Cells"a shows a healthy red blood cell. Figure 11.4 "Osmotic Pressure and Red Blood Cells"b shows a red blood cell that has been exposed to a lower concentration than normal blood serum (a socalled hypotonic solution); the cell has plumped up as solvent moves into the cell to dilute the solutes inside. Figure 11.4 "Osmotic Pressure and Red Blood Cells"c shows a red blood cell exposed to a higher concentration than normal blood serum (hypertonic); water leaves the red blood cell, so it collapses onto itself. Only when the solutions inside and outside the cell are the same (isotonic) will the red blood cell be able to do its job. Q: Osmotic pressure is important in biological systems because cell walls are what? Choices: - impassable - theonym membranes - variably membranes - semipermeable membranes A:
semipermeable membranes
(Question)
Answer the following question given this paragraph: Competition is a relationship between organisms that depend on the same resources. Competition can occur between members of the same species or between members of different species. Q: What can be calculated by solving the average speed formula? Choices: - accelaration - distance or mass - mass or time - distance or time A:
(Answer)
distance or time
Ques: Answer the following question given this paragraph: For a better understanding of alkaline Earth metals, let's take a closer look at two of them: calcium (Ca) and strontium (Sr). Calcium is a soft, gray, nontoxic alkaline Earth metal. Although pure calcium doesn't exist in nature, calcium compounds are very common in Earth's crust and in sea water. Calcium is also the most abundant metal in the human body, occurring as calcium compounds such as calcium phosphate and calcium carbonate. These calcium compounds are found in bones and make them hard and strong. The skeleton of the average adult contains about a kilogram of calcium. Because calciumlike bariumabsorbs x-rays, bones show up white in x-ray images. Calcium is an important component of a healthy human diet. Good food sources of calcium are pictured in Figure below . Q: What is a soft, gray, nontoxic alkaline earth metal? Choices: - pewter - magnesium - potassium - calcium A:
Ans: calcium
(Q).
Answer the following question given this paragraph: RNA, the other nucleic acid. RNA has many important functions, especially during protein synthesis. And what allows it to be involved in protein synthesis is its ability to fold into three-dimensional structures, giving the molecule specific functions. This structure depicts an RNA molecule. the numerous secondary structures, such as the helices, are visible. Q: Rna is especially important during synthesis of what? Choices: - glucose - mitochondria - sulfur - protein A:
(A).
protein
Ques:Answer the following question given this paragraph: Transmitted light may be refracted or scattered. When does each process occur?. Q: What two ways may light be transmitted? Choices: - magnified or scattered - reflected or refracted - absorption and refraction - refracted or scattered A:

Ans:refracted or scattered
Ques: Answer the following question given this paragraph: Each month, starting in puberty, one egg matures and is released from the ovary. Q: Each month, starting in puberty, one egg matures and is released from where? Choices: - pollen - testes - uterus - ovary A:
Ans:
ovary