A scientist claims that the presence of aquaporins in chloroplast membranes supports the endosymbiotic theory. Support the claim with evidence from biological concepts.

You are curious to know whether the amount of sugar (food) provided to yeast impacts how much waste gas is produced. To help answer this question, you set up an experiment similar to the one you performed in lab. However, this time, you use four flasks instead of two.    In Flask 1 you add 1/4 teaspoon of sugar, in Flask 2 you add 1/2 teaspoon of sugar, in Flask 3 you add 1 teaspoon of sugar, and in Flask 4 you add no sugar.   You add 1/2 teaspoon of yeast ("unlabeled sample") and 20 mL of lukewarm water to each flask.   You place a balloon on top of each flask. After 30 minutes, you measure the circumference of each balloon to determine how much gas was produced   efer back to this experiment to answer questions 1-7.   ________________   A) What were the treatment groups in this experiment? B) Which group was the control group?

Horizontal gene transfer probably started soon after endosymbiosis. It has resulted in genes being moved from the mitochondrion to the nucleus.      What is a reasonable explanation for why some genes still remain in the mitochondria?    A.  The products of those genes are rapidly damaged and need to be quickly replaced.   B.  The products of those genes are not required for organelle function.   C.  The ability for lateral gene transfer ended about a billion years ago and some genes simply got “stuck” within mitochondria.   D.  The products of those genes are only needed in the mitochondria.

Which statement is false regarding bacterial cell walls?                                                                                                                                                                                                          A.    Both Gram positive and Gram negative bacteria contain peptidoglycan in the cell wallB.    Gram negative bacteria have a thin layer of peptidoglycan and stain pinkC.    Gram (+) bacteria are positively charged due to phosphate groups in teichoic acidsD.    Gram (-) bacteria have an outer cell wall containing lipopolysaccharideE.    Both teichoic acids and lipopolysaccharide can be used to separate bacterial species