Papersbyjol

How many species are there? - ANSWER1.8 million The most important theme in biology - ANSWEREvolution All living things are capable of _______ - ANSWEREvolving The most poorly defined characteristic of biology - ANSWEREvolution Changes in the genetic makeup of a population over time (sometimes due to natural selection) - ANSWEREvolution ________ selects for a trait that is already present - ANSWERNatural Selection All living things in a particular area, along with non-living en...

which of the following would NOT be found in a DNA sequence a) adenine b)guanine c)thymine d) uracil - ANSWERD A segment of pre-mRNA is cut up by spliceosomes so that 3 eons & 2 introns are formed. How many cuts were made on the pre-mRNA? a) 3 b) 4 c) 5 d) 6 - ANSWERB if a DNA strand contains the triplet nucleotides ATG-GCC-GCT, what would be the set of anti-codons that accompany the transcribed mRNA during translation? a) TAG-CGG-CGA b) AUG-GCC-GCT c) ATG-GCC-GCT d) UAG-...

Evolution - ANSWERthe process of change that has transformed life on Earth from its earliest beginnings to the diversity of organisms living today. Evolution - ANSWERFundamental organizing principle of biology and the core theme of this book Biology - ANSWERScientific study of life Organization, Energy Use, Development, Reproduction, Evolve, Respond to the Environment - ANSWERCharacteristics of a living system Emergent Properties - ANSWERresult from the arrangement and interaction of...

The innermost electron shell of an atom can hold up to _____ electrons. - ANSWER2 Which of these relationships is true of an uncharged atom? - ANSWERThe number of protons is equal to the number of electrons. What determines the types of chemical reactions that an atom participates in? - ANSWERthe number of electrons in the outermost electron shell (stable) What is the atomic number of an atom that has 6 protons, 6 neutrons, and 6 electrons? - ANSWER6 Which of these refers to atoms wi...

Of the following functions, which is most important for the glycoproteins and glycolipids of animal cell membranes? A)facilitated diffusion of molecules down their concentration gradients B)active transport of molecules against their concentration gradients C)maintaining the integrity of fluid mosaic membrane D)maintaining membrane at low temperatures E)a cell's ability to distinguish one type of neighboring cell from another - ANSWERE)a cell's ability to distinguish one type of neig...

How many species identified and named? - ANSWERabout 1.8 million What is the central theme in biology? - ANSWERevolution What is one of the main characteristics of living things? - ANSWERthe ability to evolve Definition of Evolution - ANSWERchange in population over generational time What does variability mean? - ANSWERit means some are better suited for survival Are organisms within a species variable? - ANSWERyes Where does variability come from? - ANSWERgenes How do we ob...

About 25 of the 92 natural elements are known to be essential to life. Which four of these 25 elements make up approximately 96% of living matter? - ANSWERCarbon, Hydrogen, Nitrogen, Oxygen What is the atomic number of an atom that has 6 protons, 6 neutrons, and 6 electrons? - ANSWER6 What type of bond is joining the two hydrogen atoms? - ANSWERCovalent A(n) _____ refers to two or more atoms held together by covalent bonds. - ANSWERmolecule This atom can form up to _____ single coval...

why are membranes called phospholipid bilayers? - ANSWERphospholipids have hydrophilic head and hydrophobic tail, hydrophobic face inside of cell making 2 layers what is meant by fluid mosaic? - ANSWERMosaic of proteins drifting laterally in fluid bilayer of phospholipids how are membranes adjusted for different temperatures? - ANSWERmembrane fluidity adjusted by changing the ratio of unsaturated to saturated fatty acids how do the relative amounts of saturated and unsaturated fats chan...

What are the three types of cell signaling? - ANSWER1. Direct Contact 2. Local 3. Distant Describe direct contact cell signaling and some examples. - ANSWEROne cell actually physically touches another i.e. Gap Junctions (diffusion of signals through a plasma membrane), Plasmodesmata (diffusion of signals through a plasma membrane), and Cell-Cell Recognition (one cell have a type of signal molecule while the other cell has a receptor, and they bind and create a response) Describe local...

Chlorine has an electronegativity of 3.2, and carbon has an electronegativity of 2.6. A compound composed of chlorine atoms and carbon atoms will most likely have _____ bonds. - ANSWERpolar covalent What is not a characteristic of life? - ANSWERmovement The bonds between carbon and hydrogen in methane (CH4) are non-polar covalent bonds. Therefore, methane is not very soluble in water. - ANSWERtrue Isotopes of an element differ in the number of - ANSWERneutrons Which functional group ...