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5. Pick one plant organ that can serve as either a sugar source or a sugar sink, depending on the context. Explain a reasonable situation in which that organ might be a sugar source, and a different situation in which that same organ might be a sugar sink. (1-2 sentence limit for each situation) 

Which of the following answers most accurately summarizes statistically significant (P=0.05) differences in the data in the table below? Table: Z-test analyses of the effects of gibberellic acid (GA) and abscisic acid (ABA), each at two different concentrations, on seed germination of two species after 7 days. 100 seeds of each species were in each treatment group. Name of Plant Species Di H2O 10-6 M GA 10-4 M GA 10-6 M ABA 10-4 M ABA Geranium germination % 96 81 84 88 24 Geranium Z-value 1.48 1.23 0.97 3.89 Geranium Z-value probability (p-value) 0.14 0.22 0.33

The Earth, unless we ruin it, will last for how many more years in its current state in the wondrous Solar System?

2. Stomata embedded in the leaf next to other epidermal cells are critical for water transport up and down the plant’s stem. In the guard cells of a stomatal complex in a leaf sample from your plant, you determine ΨS = -12, and ΨP = 9. In the adjacent subsidiary cells, you determine ΨS = -14 and ΨP = 7. Will the stoma open or close? Explain your reasoning. (3-4 sentence limit)

Had enough yet? Of course you haven’t, we’re just getting started…   Why are plants so skinny? They only eat a light snack.

Extra credit – 1 pt Professor Gardner found that figure on the internet, and though it’s nice, there is a mistake on it. Can you spot it? What is the mistake in this picture? (More than one possible answer with good justification)

Amputation can be defined as:   

9. You sequence one of your mutants and discover its phenotype is controlled by one gene and has recessive inheritance. You call the gene abain, for ABA-insensitive.  When your ABA mutant produces spores via meiosis, what percentage of them will contain the recessive allele?

3. Ignoring all other factors, which of the following types of days – a cool, dry day; a hot, dry day; a warm, humid day; or a cool, humid day – would result in the fastest delivery of the Fe2+ cation to the leaves of the rhododendron? Explain your reasoning. (3-4 sentence limit)

Bonus:  Worth up to 5 points (ignore that it says 0 as I will manually grade submissions).   You are a great friend and wish to create a dating profile for your lonely stellar friend.  She is located in the lower right portion of the HR diagram.  Give two adjectives (with explanations) that fit her personality while also showing your understanding of the meaning of the prompt. See rubric below.   Rubric: 1st adjective (0.5 points) and explanation (2 points) 2nd adjective (0.5 points) and explanation (2 points) Please follow explicit instructions and only give two adjectives with two supporting statements. Failure to follow these explicit instructions will result in point loss. No credit will be given for vague or general adjectives that either do not pertain to the prompt or could pertain to any object on the diagram. Make sure you fully explain your meaning in a way that relates to course content and shows your understanding of the material. You can be ridiculous here as long as it is well-explained in the context of the subject matter. For example:  Middle-aged – this star is in the middle part of her life