(Q).
Q: What do vertebrate chordates possess that invertebrate chordates do not? Read this paragraph and choose the correct option from the provided answers: Chordates include vertebrates and invertebrates that have a notochord. Chordates also have a post-anal tail, dorsal hollow nerve cord, and pharyngeal slits. Vertebrate chordates have a backbone, while invertebrate chordates do not. Invertebrate chordates include tunicates and lancelets; both are primitive marine organisms. Choices: - parasite - Thumb - Milk production - backbone A:
(A).
backbone

(Q).
Q: What term describes a property of a liquid based on the strength of its intermolecular forces? Read this paragraph and choose the correct option from the provided answers: Because they cannot escape the container, the vapor molecules above the surface of the liquid exert a pressure on the walls of the container. The vapor pressure is a measure of the presure (force per unit area) exerted by a gas above a liquid in a sealed container. Vapor pressure is a property of a liquid based on the strength of its intermolecular forces. A liquid with weak intermolecular forces evaporates more easily and has a high vapor pressure. A liquid with stronger intermolecular forces does not evaporate easily and thus has a lower vapor pressure. For example, diethyl ether is a nonpolar liquid with weak dispersion forces. Its vapor pressure at 20C is 58.96 kPa. Water is a polar liquid whose molecules are attracted to one another by relatively strong hydrogen bonding. The vapor pressure of water at 20C is only 2.33 kPa, far less than that of diethyl ether. Choices: - analogous pressure - cellular pressure - tissue pressure - vapor pressure A:
(A).
vapor pressure

(Q).
Q: What's the process responsible for the presence of oxygen in our atmosphere? Read this paragraph and choose the correct option from the provided answers: Choices: - respiration - ozone - glycolysis - photosynthesis A:
(A).
photosynthesis