Match the following scenarios to the type of speciation taking placeA population of 100 squirrels lives in a lush green valley. A sudden earthquake changes the flow of the local river, causing it to diverge through the center of the valley. About 45 squirrels are trapped on the east river bank, while the other 55 squirrels are trapped on the west river bank. The river is impassable. After thousands of years, the two sub-populations of squirrels accumulate differences that make them reproductively isolated.

Match the descriptions / definitions with the term they best describe 1. three dimensional relationship of the different polypeptide chains in a multisubunit protein or protein complex 2. common folding pattern in proteins in which a linear sequence of amino acids folds into a right-handed coil stabilized by internal hydrogen-bonding between polypeptide backbone atoms. 3. the amino acid sequence of a protein 4. a region on the surface of a protein that can interact with another molecule through noncovalent bonding. 5. three-dimensional arrangement of alpha-helices and beta-sheets within a single polypeptide, typically stabilized by a variety of noncovalent bonds, including ionic and hydrogen bonds, and nonpolar interactions / hydrophobic force. 6. the chain of repeating carbon and nitrogen atoms, linked by peptide bonds, in a protein. 7. common structural motif in proteins in which different sections of the polypeptide chain run alongside each other and are joined together by hydrogen bonding between atoms of the polypeptide backbone. 8. portion of a polypeptide chain that has a discrete tertiary structure of its own and can often fold independently of the rest of the chain 9. regular local folding patterns in a protein, including alpha-helix and beta-sheet a. primary structure b. beta-sheet c. protein d. coiled-coil e. polypeptide backbone f. secondary structure g. side chain h. tertiary structure i. binding site j. alpha-helix k. quaternary structure l. protein domain

Which type of bond forms between water moleculesstrong bondhydrogen bondcovalent bondpolar bond

How does buring fossil fuels impact does carbon cycle? what large impact does this have on the envirnment?