One of the main functions of chondroitin sulfate, a glycosaminoglycan, is to act as a lubrican in skeletal joints by creating a gel-like medium that is resilient to friction and shock. this function is attributed to a distinctive property of chondrotin sulfate, where the volume occupied by the molecule is much greater in solution than in the ehydrated solid. select the statements that describe the characteristics of glycosaminoglycans that allow chondrotin sulfate to occupy a much larger volume in chondroitin sulfate consists of several thousand repeats of the dissacharide subunits that trap a large number of water molecules. this increases the molecular volume of the in solution, the highly branched structure of chondroitin sulfate froms a gel-like matrix that interacts with numerous water molecules. this increases the molecular volume of the in solution, chondroitin sulfate molecules form double helicies that associate with one another and trap a larger number of water molecules. this increases the molecular volume of the chondroitin sulfate has a high density of negative charges. to ensure adequate separation of negatively charged groups, chondroitin sulfate adopts an extended rod-like structure that increases its molecular volume in the highly polar nature of chondroitin sulfate attracts numerous water molecules. non-covalent interactions with a large number of water molecules increases its molecular volume.

Question 11 which of the following personal health practices should a person follow to reduce the risk of skin cancer? avoid staying outdoors when the sun is strongest. consume antibiotics to prevent bacterial attacks. wash hands frequently to maintain proper hygiene. have a balanced diet and exercise regularly. question 12 a student wants to compare how easily a metal and a plastic spoon of the same temperature can transfer thermal energy. which of the following activities should the student perform? measure the effort required to bend each spoon. place an ice cube on each spoon and record the rate of melting of the cubes. place the spoons at room temperature and record the change in temperature of each. measure the change in weight of the spoons after placing them in the freezer for a few minutes. question 13 the characteristics of certain cell divisions are described in the following table. cell division characteristics characteristic description 1 forms diploid cells 2 creates sex cells, or gametes which type(s) of cell division do the two characteristics represent? both characteristics represent meiosis. both characteristics represent mitosis. characteristic 1 represents meiosis and characteristic 2 represents mitosis. characteristic 1 represents mitosis and characteristic 2 represents meiosis. question 14 which of the following adaptations in wooly mammoths could have best prevented their extinction? shedding of fur darker color of fur growth of an extra layer of fur increase in the thickness of fur question 15 maria and ben are both suffering from a hereditary disease, as described in the following table. description of disease patient description maria blood cells get stuck in blood vessels, causing painful attacks ben hemoglobin is abnormal due to curved shape of red blood cells which disease(s) are maria and ben suffering from? both are suffering from type 1 diabetes. both are suffering from sickle cell anemia. maria is suffering from sickle cell anemia and ben from type 1 diabetes. maria is suffering from type 1 diabetes and ben from sickle cell anemia. question 16 which of the following icons is used to represent a female carrier of a disease? a half-filled circle a half-filled square a completely filled circle a completely filled square question 17 joe sowed seeds of a plant in two different types of soil in separate pots. she added the same amount of fertilizer to the pots. she then placed the pots in the sun and recorded their growth after four days. what is the independent variable in the study? duration of growth amount of fertilizer growth of seeds type of soil question 18 philip has curly hair and his sister has straight hair. which of the following explains why philip and his sister have different hair types? both children received the same hair coding gene from their mother. both children received the same hair coding gene from their father. their mother was exposed to different environments before their births. the children each received different genes from their parents. question 19 which statement is most likely correct about species which cannot adapt? they become extinct. their immunity increases. their population increases. they produce more offspring. question 20 four animals live in the arctic. their characteristics are described in the following table. animal characteristics a long tail b small feet c black fur d white skin which animal is least likely to be captured by its enemies? animal a animal b animal c animal d

Im inn a ! what"s the answer which of the following is one way creativity can scientists? by ensuring they follow the scientific method by increasing the amount of time it takes to complete scientific experiments by making sure they only try things that have already been proven by leading them to ask more questions about the natural world

Mitosis creates two identical daughter cells from one parent cell creates four nonidentical daughter cells from one parent cell is the most common type of reproduction for bacteria is the process by which male and female reproductive cells are created