Answer the following question given this paragraph: Unlike oxygen, carbon dioxide is more concentrated in the blood in the capillaries surrounding the alveoli than it is in the air inside the alveoli. Therefore, carbon dioxide diffuses in the opposite direction. It moves out of the blood and into the air. Q: Which gas moves from the blood in the capillaries into the air? Choices: - nitrogen - carbon monoxide - oxygen - carbon dioxide A:
carbon dioxide
(Question)
Answer the following question given this paragraph: Q: Plants have a touch response known as what? Choices: - trichina - pollenation - photosynthesis - thigmotropism A:
(Answer)
thigmotropism
Ques: Answer the following question given this paragraph: Having polar bonds may make a covalent compound polar. A polar compound is one in which there is a slight difference in charge between opposite ends of the molecule. All polar compounds contain polar bonds. But having polar bonds does not necessarily result in a polar compound. It depends on how the atoms are arranged. This is illustrated in Figure below . Both molecules in the figure contain polar bonds, but only formaldehyde is a polar compound. Why is carbon dioxide nonpolar?. Q: Having polar bonds may make a covalent compound what? Choices: - ionic - negatively charged - neutral - polar A:
Ans: polar
(Q).
Answer the following question given this paragraph: The two main divisions of the human nervous system are the central nervous system and the peripheral nervous system. The peripheral nervous system has additional divisions. Q: What are the two main divisions of the human nervous system? Choices: - somatic and autonomic - central and identical - left and right - central and peripheral A:
(A).
central and peripheral
Ques:Answer the following question given this paragraph: Hemoglobin is a protein that transports oxygen throughout the body. Source: Image from the RCSB PDB (www. org) of PDB ID 1I3D (R. Kidd, H. Baker, A. Mathews, T. Brittain, E. Baker (2001) Oligomerization and ligand binding in a homotetrameric hemoglobin: two high-resolution crystal structures of hemoglobin Bart's (gamma(4)), a marker for alpha-thalassemia. Protein Sci. 1739 1749). Figure 18.8 Levels of Structure in Proteins Saylor URL: http://www. saylor. org/books. Q: What is the job of hemoglobin in the body? Choices: - infects oxygen - become scabs - transports neurons - transports oxygen A:

Ans:transports oxygen
Ques:Answer the following question given this paragraph: Spermatogenesis As just noted, spermatogenesis occurs in the seminiferous tubules that form the bulk of each testis (see Figure 27.4). The process begins at puberty, after which time sperm are produced constantly throughout a man's life. One production cycle, from spermatogonia through formed sperm, takes approximately 64 days. A new cycle starts approximately every 16 days, although this timing is not synchronous across the seminiferous tubules. Sperm countsthe total number of sperm a man producesslowly decline after age 35, and some studies suggest that smoking can lower sperm counts irrespective of age. The process of spermatogenesis begins with mitosis of the diploid spermatogonia (Figure 27.5). Because these cells are diploid (2n), they each have a complete copy of the father's genetic material, or 46 chromosomes. However, mature gametes are haploid (1n), containing 23 chromosomesmeaning that daughter cells of spermatogonia must undergo a second cellular division through the process of meiosis. Q: How many chromosomes do mature gametes contain? Choices: - 19 - 13 - 17 - 23 A:

Ans:
23