This is an example of a drop-down question, similar in style to that in the mid-sem quiz. However, the questions in the quiz will not be as long as this one! Maximising surface area A key function of the small intestine is to absorb nutrients from digested food. There are a number of specialisations of the small intestine that allow it to do this. Firstly, the small intestine (duodenum, jejunum and ileum) is very long. Secondly, there are a number of smaller and larger projections of cells and tissues that increase the surface area. Particularly noticeable in the jejunum are Blank 1 Question 3[select: , Villi, Plicae ciculares, Microvilli, Brush border] that are folds of the second layer of the gastrointestinal tissue (the Blank 2 Question 3[select: , Submucosa, Muscularis mucosa, Mucosa] ). On top of these are finger-like projections of the Blank 3 Question 3[select: , Submucosa, Muscularis mucosa, Mucosa] called Blank 4 Question 3[select: , Villi, Plicae ciculares, Microvilli, Brush border] .  On the enterocytes (absorptive cells) of the epithelial layer are many projections of the cell membrane called Blank 5 Question 3[select: , Villi, Plicae ciculares, Microvilli, Brush border] .  This is also called a Blank 6 Question 3[select: , Villi, Plicae ciculares, Microvilli, Brush border] .  It is formed from intracellular projections of Blank 7 Question 3[select: , intermediate filaments, actin microfilaments, microtubules] .多重下拉选择题

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This is an example of a drop-down question, similar in style to that in the mid-sem quiz. However, the questions in the quiz will not be as long as this one! Maximising surface area A key function of the small intestine is to absorb nutrients from digested food. There are a number of specialisations of the small intestine that allow it to do this. Firstly, the small intestine (duodenum, jejunum and ileum) is very long. Secondly, there are a number of smaller and larger projections of cells and tissues that increase the surface area. Particularly noticeable in the jejunum are Blank 1 Question 3[select: , Plicae ciculares, Brush border, Villi, Microvilli] that are folds of the second layer of the gastrointestinal tissue (the Blank 2 Question 3[select: , Muscularis mucosa, Mucosa, Submucosa] ). On top of these are finger-like projections of the Blank 3 Question 3[select: , Muscularis mucosa, Mucosa, Submucosa] called Blank 4 Question 3[select: , Plicae ciculares, Brush border, Villi, Microvilli] .  On the enterocytes (absorptive cells) of the epithelial layer are many projections of the cell membrane called Blank 5 Question 3[select: , Plicae ciculares, Brush border, Villi, Microvilli] .  This is also called a Blank 6 Question 3[select: , Plicae ciculares, Brush border, Villi, Microvilli] .  It is formed from intracellular projections of Blank 7 Question 3[select: , actin microfilaments, microtubules, intermediate filaments] .

For two animals to be considered of the same species, which of the following MUST be true?

Global warming and climate change are already causing a variety of changes in biotic systems and communities.   For each of the following scenarios that we discussed in class, select whether they would result in a positive feedback or negative feedback in terms of warming.  1: More lianas (vines) grow in rainforests displacing trees 2: Dark-colored boreal forests expands into zones formerly occupied by light-colored tundra and snow/ice. 3: Tundra permafrost melts, exposing more soil to decomposition

According to lecture and the reading, “Ecological Impacts of Climate Change,” in addition to a shift in species’ range, changes in species’ ______ also have been observed.

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