Answer the following question given this paragraph: Image copyright CREATISTA, 2014. The autonomous nervous system controls responses such as fight or flight . Used under license from Shutterstock. com. Q: The fight or flight response and similar responses are controlled by what part of the nervous system? Choices: - cells - spinal cord - central nervous system - autonomous A:
autonomous
(Question)
Answer the following question given this paragraph: Each separate substance in a medium, such as the extracellular fluid, has its own concentration gradient, independent of the concentration gradients of other materials. Additionally, each substance will diffuse according to that gradient. Several factors affect the rate of diffusion. Extent of the concentration gradient: The greater the difference in concentration, the more rapid the diffusion. The closer the distribution of the material gets to equilibrium, the slower the rate of diffusion becomes. Mass of the molecules diffusing: More massive molecules move more slowly, because it is more difficult for them to move between the molecules of the substance they are moving through; therefore, they diffuse more slowly. Temperature: Higher temperatures increase the energy and therefore the movement of the molecules, increasing the rate of diffusion. Solvent density: As the density of the solvent increases, the rate of diffusion decreases. The molecules slow down because they have a more difficult time getting through the denser medium. Q: In a medium, the closer the distribution of the material gets to what state, the slower the rate of diffusion becomes? Choices: - erosion - gas - elastic - equilibrium A:
(Answer)
equilibrium
Ques: Answer the following question given this paragraph: Q: The mostly subterranean lifestyle of stone plants reduces water loss from evaporation and inhibits what? Choices: - reactions - chlorophyll - tissues - photosynthesis A:
Ans: photosynthesis
(Q).
Answer the following question given this paragraph: If you were to filter out all the cells in blood, a golden-yellow liquid would be left behind. Plasma is this fluid part of the blood. Plasma is about 90% water and about 10% dissolved proteins, glucose, ions, hormones, and gases. Blood is made up mostly of plasma. Q: If you were to filter out all the cells in blood, you would be left with what golden-yellow liquid? Choices: - platelets - pus - hemoglobin - plasma A:
(A).
plasma
Ques:Answer the following question given this paragraph: Mariana Ruiz Villarreal (User:LadyofHats/Wikimedia Commons), modified by Hana Zavadska. The sodium-potassium pump uses active transport . Public Domain. Q: Unlike the passive form, the sodium-potassium pump uses what type of transport? Choices: - High - Low - phase - active A:

Ans:active
Ques: Answer the following question given this paragraph: Before the atmosphere became oxygenated, the planet was subjected to strong radiation; thus, the first organisms would have flourished where they were more protected, such as in ocean depths or beneath the surface of Earth. At this time, too, strong volcanic activity was common on Earth, so it is likely that these first organismsthe first prokaryoteswere adapted to very high temperatures. These are not the typical temperate environments in which most life flourishes today; thus, we can conclude that the first organisms that appeared on Earth likely were able to withstand harsh conditions. Microbial mats may represent the earliest forms of life on Earth, and there is fossil evidence of their presence, starting about 3.5 billion years ago. A microbial mat is a large biofilm, a multi-layered sheet of prokaryotes (Figure 13.3a), including mostly bacteria, but also archaea. Microbial mats are a few centimeters thick, and they typically grow on moist surfaces. Their various types of prokaryotes carry out different metabolic pathways, and for this reason, they reflect various colors. Prokaryotes in a microbial mat are held together by a gummy-like substance that they secrete. The first microbial mats likely obtained their energy from hydrothermal vents. A hydrothermal vent is a fissure in Earth's surface that releases geothermally heated water. With the evolution of photosynthesis about 3 billion years ago, some prokaryotes in microbial mats came to use a more widely available energy sourcesunlightwhereas others were still dependent on chemicals from hydrothermal vents for food. Q: Before the atmosphere became oxygenated, the planet was subjected to what harmful energy source, meaning the first organisms would have flourished where they were more protected? Choices: - evaporation - conduction - convection - radiation A:
Ans:
radiation