<p>My answers:</p>
<p>1) (a) nucleolus - stores DNA
mitchondria - cellular respiration
(b) DNA - genetic makeup of cell; which is used to produce new proteins.
Ribosomes - produce proteins...
(c) cyanobacteria converted CO2 --> O2 which allowed for eukaryotes to exist.
2) (a) no natural barriers in new environment
(b) A - no effect (distinct niches);
B - decreased population (predation + sucessful competition)
(c) 40 mil - will run out of resources by that time and population will stabilize
(d) no natural barriers, free niche
3) (a) Water moves up xylem from root to leaf and is then expelled. Turgid pressure and capillary action helps this occur.
(b) Increased gas concentration --> increased pressure --> decreased rate of transpiration.
(c) closing stomatas at day and open at night -- decreased transpiration during day; longer roots -- higher rate of transpiration.
4) (a) lungs -- oxygen to blood; small intenstine - glucose to blood;
(b) via arteries, capilleries, and veins.. atriums and ventricles..
(c) capillaries make contact w/ cells; respiration occurs.. O2+Glucose moves in, CO2+Water comes out. and go back to lungs...</p>
<p>I think your step C in part 1 is incorrect. Endosymbiotic theory states that prokaryotic cells engulfed mitochondria and were able to harness additional ATP as a result of being able to carry out aerobic respiration. This allowed for the evolution of additional organelles Evidence for this would be mitochondrial DNA assimilated into the DNA of eukaryotic cells.</p>
<p>In essay 4 I mentioned alveoli diffusion in the lungs and that glucose is stored as glycogen in the liver. Some nutrients are also absorbed by villi in the small intestine.</p>
<p>I think essay 2 was kinda open-ended about the prediction of how the population would do. I said that the new beetles would over-populate and deplete resources, resulting in a boom and bust cycle. Otherwise, our answers seem to agree pretty much.</p>
<p>what percent score do you think my answers will give me</p>
<p>its impossible to tell by telling us what you have. When grading FRQ's, they have a master list of 'facts' that earn you points. if they find one, they give you a point.</p>
<p>anyone else wants to check my answers?</p>
<p>What is this lab section that everyone was surprised about? (It did not appear on the exam?)</p>
<p>yeah. usually there is a lab, like "design your own lab" or something, but there was not on this exam</p>
<p>Yeah...no design lab question, but there was the frq on transpiration which pertains to one of the labs we covered this year. It was quite simple.</p>
<p>for #4, i also mentioned hemoglobin carrying oxygen in blood throughout the body.. other parts of the blood carry glucose..</p>
<p>2) I mentioned competitive exclusion principle, biotic potential, and carrying capacity along with abiotic, biotic factors</p>
<p>4) I mentioned how the diaphragm contracts resulting in an increase in volume and thus a decrese in pressure, so a concentration gradient is created, and oxygen moves in. I also mentioned hemoglobin.</p>
<p>weeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee</p>