Answer the following question given this paragraph: The surface tension of water is illustrated by a number of common occurrences. For example, water spiders are able to walk across bodies of water because of surface tension. Even though the spiders are denser than water, they do not sink, because the small amount of weight pressing down on the surface is not enough to break the strong hydrogen bonds that hold the surface together. Q: The ability of a water spider to walk across a body of water is an example of what? Choices: - high density - low gravity - magnetism - surface tension A:
surface tension
(Question)
Answer the following question given this paragraph: Density is mass per unit volume. Density is a measure of how closely molecules are packed together. The closer together they are, the greater the density. Since air is a gas, the molecules can pack tightly or spread out. Q: What is the measure of how closely molecules are packed together? Choices: - length - volume - frequency - density A:
(Answer)
density
Ques: Answer the following question given this paragraph: Not all archaeans live in extreme conditions. In fact, archaeans are now known to live just about everywhere on Earth. They make up as much as 20 percent of Earth's total mass of living things. Q: What kingdom of organisms constitutes up to 20 percent of all living things on earth in mass? Choices: - protists - sporozoans - vertebrates - archaeans A:
Ans: archaeans
(Q).
Answer the following question given this paragraph: The anterior pituitary produces six hormones: growth hormone, prolactin, thyroid-stimulating hormone, adrenocorticotropic hormone, follicle-stimulating hormone, and luteinizing hormone. Growth hormone stimulates cellular activities like protein synthesis that promote growth. Prolactin stimulates the production of milk by the mammary glands. The other hormones produced by the anterior pituitary regulate the production of hormones by other endocrine tissues (Table 16.1). Q: Some hormones produced by the anterior pituitary regulate the production of hormones by other tissues belonging to what system? Choices: - nervous - digestive - cardiovascular - endocrine A:
(A).
endocrine
Ques:Answer the following question given this paragraph: a deep hole in the seafloor where subduction takes place; trenches are the deepest places on Earth. Q: What is the term for the deepest places on earth? Choices: - the core - tunnels - mines - trenches A:

Ans:trenches
Answer the following question given this paragraph: Plasma membranes are primarily made up of phospholipids (orange). The hydrophilic ("water-loving") head and two hydrophobic ("water-hating") tails are shown. The phospholipids form a bilayer (two layers). The middle of the bilayer is an area without water. There can be water on either side of the bilayer. There are many proteins throughout the membrane. Q: What substances that primarily comprise plasma membranes form a bilayer? Choices: - amino acids - enzymes - steroids - phospholipids A:
phospholipids