Answer the following question given this paragraph: Aquatic arthropods use gills to exchange gases. These gills have a large surface area in contact with the water, so they can absorb more oxygen. Q: What do aquatic arthropods use to exchange gases? Choices: - lungs - pores - diaphragm - gills A:
gills
(Question)
Answer the following question given this paragraph: Steam actually consists of tiny droplets of liquid water. What you can't see in the picture is the water vapor that is also present in the air above the spring. Water vapor is water in the gaseous state. It constantly rises up from the surface of boiling hot water. Why? At high temperatures, particles of a liquid gain enough energy to completely overcome the force of attraction between them, so they change to a gas. The gas forms bubbles that rise to the surface of the liquid because gas is less dense than liquid. The bubbling up of the liquid is called boiling. When the bubbles reach the surface, the gas escapes into the air. The entire process in which a liquid boils and changes to a gas that escapes into the air is called vaporization . You can watch an animation of the process at this URL: http://www. visionlearning. com/img/app/library/objects/Flash/VLObject-321-030317040343. swf. Q: Steam actually consists of tiny droplets of liquid what? Choices: - lead - methane - mercury - water A:
(Answer)
water
Ques: Answer the following question given this paragraph: about how that occurs, in terms of membrane structure. If the influx of water continued unopposed, the membrane would eventually burst like an over-inflated balloon, killing the cell. One strategy to avoid this lethal outcome, adopted by a range of organisms, is to build a semi-rigid "cell wall" exterior to the plasma membrane (). The synthesis of this cell wall is based on the controlled assembly of macromolecules secreted by the cell through the process of exocytosis (see above). As water passes through the plasma membrane and into the cell (driven by osmosis), the plasma membrane is pressed up against the cell wall. The force exerted by the rigid cell wall on the membrane balances the force of water entering the cell. When the two forces are equal, the net influx of water into the cell stops. Conversely, if the [H2O]outside decreases, this pressure is reduced, the membrane moves away from the cell wall and, because they are only semi-rigid, the walls flex. It is this behavior that causes plants to wilt when they do not get enough water. These are passive behaviors, based on the structure of the cell wall; they are built into the wall as it is assembled. Once the cell wall has been built, a cell with a cell wall does not need to expend energy to resist osmotic effects. Plants, fungi, bacteria and archaea all have cell walls. A number of antibiotics work by disrupting the assembly of bacterial cell walls. This leaves the bacteria osmotically sensitive, water enters these cells until they burst and die. Questions to answer & to ponder: Make a graph of the water concentration across a typical cellular membrane for an organism living in fresh water; explain what factors influenced your drawing. Look at this video: https://www. youtube. com/watch?v=VctALENHyyI&feature=youtu. How could you use reverse osmosis to purify water? Where does the energy involved in moving molecules come from? Plants and animals are both eukaryotes; how would you decide whether the common ancestor of the eukaryotes had a cell... Q: Plants, fungi, bacteria and archaea cells all have what feature that keeps them rigid that animal cells do not have? Choices: - cytoplasm - cell membrane - plastids - cell walls A:
Ans: cell walls
(Q).
Answer the following question given this paragraph: That is the main difference between sexual and asexual reproduction. Sexual reproduction just means combining genetic material from two parents. Asexual reproduction produces offspring genetically identical to the one parent. Q: Which reproduction produces offspring genetically identical to the one parent? Choices: - bsexual - sexual - microscopic - asexual A:
(A).
asexual
Ques:Answer the following question given this paragraph: The process of assembling amino acids into a protein takes place in the ribosome. This structure consists of two subunits, each of which is composed of both proteins and ribosomal RNA (rRNA). The two subunits clamp together on the mRNA and catalyze the formation of the amide linkages in the growing protein. When protein synthesis is complete, the two subunits dissociate and release the completed protein chain. Q: Where does the process of assembling amino acids into a protein take place? Choices: - in the nucleus - in chromosomes - in the chitin - in the ribosome A:

Ans:in the ribosome
Answer the following question given this paragraph: Q: What are misfolded versions of normal brain proteins? Choices: - ribosomes - protons - humans - prions A:
prions