Queens Bio 103 Review 2023 Study Guide Rated A+

Facilitation {Ans: An interaction in which one species has a positive effect on the survival and reproduction of another species without the intimate association of a symbiosis}As long as there is genetic variation for a trait, that trait will change across generations due to natural selection. true or false? {Ans: False. Although genetic variation in a trait is one of the essential ingredients of evolution via natural selection, variation in that traits must also cause variation in survival and/or reproduction (i.e. fitness).}When lipids are digested, they make their way to the liver via the hepatic portal vein, where they are processed into lipoproteins. true or false? {Ans: false, This is a bit of a sloppy question for a bunch of reasons. Some lipids (the water soluble ones) do travel in this manner (via the hepatic portal vein) but thats beyond the scope of the course. This statement is getting at 2 aspects. First, lipids leave enterocytes as lipoproteins (chylomicrons), so this happens before they get to the liver. Second, they travel to the liver via lymph vessels.}There was a striking increase in the number of tetrapod lineages over time as our extant continents drifted apart but the