Complete the following text.
Light enters your eye through a clear portion of the sclera, called the 1 . It is curved, so the light rays slightly bend as they pass through it. Light then passes through the 2 humour and then through the pupil. The 3 adjust so the size of the pupil. It is the coloured part of the eye. In the dim light, the Iris 4 and rhetoric up I'll gets bigger; in bright light, the Iris expands and the pupil gets smaller. Directly behind the iris is the 5. This is the structure that can change shape in order to focus light onto the retina, so that we can see the objects clearly. The ciliary muscles, around the lens control the shape of the lens. Behind the lens is a clear gel-like substance called the 6 humour. The light passes through this and strikes the 7 which is the inner most layer of the eye. It contains two types of cells: rods and cones. Rods are sensitive to 8 light, while the cones are sensitive to bright light and colour. The rods and cones send the messages through the 9 nerve, which carries the information to the 10 . The brain interprets the image of the object.

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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

What are two ways that harvesting algae from the ocean may benefit human society? how might the harvest of algae negatively impact the ocean communities where that algae grows? how could this be prevented?

Parthenogenesis is a type of reproduction that does not require a mate. it’s rarely seen in birds and higher vertebrates. parthenogenesis involves the formation of a zygote. but this zygote is formed without fertilization. in parthenogenesis, in the absence of a male gamete, the ovum develops directly in the zygote.