<p>mRNA - provides a template for sequencing amino acids into polypeptides</p>
<p>tRNA - tranpsorts amino acids to mRNA template</p>
<p>rRNA - builds ribsomes? omg.. I forgot this..</p>
<p>New question: Snails, octopuses, and squids belong to which animal phyla?</p>
<p>Mollusca</p>
<p>What are the 2 types of growth (describe there graphs as well and if they are k selected or r selected)</p>
<p>ok double post::: Movement of Water and Minerals in plants.</p>
<p>Osmosis - movement of water through a concentration gradient. Water leaves the roots continuously and there is mineral concentration only on the inside. There is also root pressure but i think that deals with formation of water at the root tips but its not very strong?</p>
<p>Cohesion Theory - movement in the xylem part , evaporation of water creates a tension. Cohesion attracts what is alike and forms from the polarity of the molecules. </p>
<p>Capillaries - this deals with adhesion and the attraction of unlike substances. It helps with movement of water in an up direction in xylem.</p>
<p>exponential and logistic growth (population size = dependent variable and time = independent variable)</p>
<p>exponential growth - no limit to population size (r-selected)</p>
<p>logistic growth - population size is limited by carrying capacity (k-selected)</p>
<p>Q: Sea stars and sea urchins belong to which animal phyla? Lol I have trouble memorizing diff. characteristics of animal phylum.</p>
<p>Gah I hate classification, I had to look this one up as well</p>
<p>Echindermata</p>
<p>List and describe the steps in meiosis I and II</p>
<p>G1: the cell grows, doubling its organelles and cytoplasm
S: The cell replicates and doubles all of its DNA
G2: The cell continues to grow
Cytokinesis (sorry about the spelling):</p>
<p>Describe which embryonic layers become which organs (ectoderm becomes skin, etc)</p>
<p>barpkeo15, aren't those the stages in interphase?</p>
<p>ectoderm: skin, eyes, nervous system, skeleton, brain
mesoderm: intestinal things, reproductive system, .....more things..</p>
<p>What is an allantois?</p>
<p>It's in a embryo thing, not sure what it is though. Gas transfer, perhaps?</p>
<p>allantois helps the developing embryo to exchange gases and eliminate liquid waste.</p>
<p>Do we have to know about the specific parts of the eye?</p>
<p>What is a sclera?</p>
<p>Yeah sorry... I didn't mean to post that.</p>
<p>List and describe the steps in meiosis I and II</p>
<p>kk so:</p>
<p>Meiosis I consists of Prophase, Metaphase, Anaphase and Telophase all I.</p>
<p>Pro I - begins just as it does in mitosis. nucleolus dissapeasrs , envelope breaks, chromatin gets smaller
Met I - Formation of the metaphase plate
Ana I - Moving to opposite poles
Telo I - formation of haploid cells (2 cells)</p>
<p>Goes directly to:</p>
<p>Pro II - no crossing over spindles develop.
Met II - single alignment in the metaphase plate.
Ana II - each chromosome is pulled by 2 chormatids
Telo II - nuclear envelope appears, cytokinesis occurs and there are 4 haploid cells created.</p>
<p>You probably should know the eye and ear.</p>
<p>what is achondroplasia?
what is a spori?</p>
<p>(learned last week in class try not to look up to answer this one)</p>
<p>achondroplasia is a skeletal disorder in which cartilage forms into bone early and dwarfism occurs.
(I'm assuming you meant "spore") A haploid cell that develops into a gamete producing structure by mitosis, I think.</p>
<p>What is phototrophism and gravitrophism in plants?</p>
<p>Gah I was just reading about those. Umm phototrophism is reaction to light and gravitrophism is reaction to gravity?</p>