Bio final exam stuvia - Study guides, Class notes & Summaries

Hierarchy of Complexity - ANSWER Atom Molecules Organelles Cells Tissue Organ Organ System Organism Molecules - ANSWER Particle composed of at least two atoms Organelles - ANSWER Microscopic structures in a cell that carry out individual functions Cells - ANSWER Smallest unit of an organism that carry out basic functions of life Tissue - ANSWER Mass of similar cells that form an organ and preform a specific function Organ - ANSWER Structure composed of two or more tissue ty...

Nerves are __________ of the nervous system. A. organs B. tissues C. organ systems D. organelles E. cells - ANSWER a. organs The term "nerve fiber" refers to a(n) __________. A. nerve cell B. organelle in nerve cells C. organ D. axon E. bundle of macromolecules in nerve cells - ANSWER d. axon What is the primary site on a neuron for receiving signals from other neurons? a. the axon terminals b. the axons c. the axon collaterals d. the neurosomas e. the dend...

BIO AC U5 Test (For Final) Exam Questions and Answers (T1) What is a gene? - ANSWER-A segment of DNA that produces a protein thus determining a trait (T1) What is a chromosome? - ANSWER-A condensed or compact "rod" of DNA that carries genetic information (T1) What is DNA? - ANSWER-helical molecule that carries the genetic information of an organism and is passed from parent to offspring. (T1) What is a genome? - ANSWER-All the DNA in one cell of an organism (T1) What is a nucleus? ...

Proteins are largely responsible for the traits of living organisms, while ________ provides the blueprint for the organization, development, and function of living things. - ANSWER-DNA What feature of genetic mutations can eventually lead to the evolution of new species? - ANSWER-Mutations produce changes in the DNA sequence of a gene. The complete genetic composition of an organism is called its - ANSWER-genome. A researcher decides to test the scientific validity of the common phrase...

True - ANSWER Echinoderms are classified as gills bc they are evaginations of the body surface Evagination - ANSWER pushing out of the ectoderm True - ANSWER The external intercostal muscles participate in inspiration True - ANSWER The internal intercostal muscles participate in expiration Where does the external intercostal muscle originate - ANSWER Inferior surface of the proximal parts of the ribs Lower ribs on the superior and distal parts False - ANSWER The tracheal system o...

Define biodiversity - ANSWER the diversity of plant and animal life in a particular habitat (or in the world as a whole) Define genetic diversity - ANSWER the total genetic information contained within all individuals of a species, population, or community Why is genetic diversity important? - ANSWER provides the raw materials for adaptive change Define adaptive change - ANSWER change in response to the environment's "natural selection: Define species diversity - ANSWER the diversi...

RNA polymerase - ANSWER pries the two strands of DNA apart and joins the RNA nucleotides as they base-pair along the DNA templates promoter - ANSWER DNA sequence where RNA polymerase attaches and initiates transcription Synthesis of RNA transcript - ANSWER initiation; elongation; termination synthesis of RNA transcript initiation - ANSWER after RNA polymerase binds to the promoter, the DNA strands unwind, and the polymerase initiates RNA synthesis at the start point of the template stra...

passive (simple) diffusion - ANSWER -from high to low concentration of solute -no energy required -no membrane protein required if cell is placed in surrounding solution with higher solute concentration then inside the cell, the solution is ____ relative to the cell - ANSWER hypertonic If cell is placed in surrounding solution with lower solute concentration than inside cell, the solution is _____ relative to the cell - ANSWER hypotonic concentrations same inside and outside - ANSWER ...

What statement best distinguishes scientific hypotheses from scientific theories? - ANSWER Hypotheses are usually narrower in scope; theories have broader explanatory power. A controlled experiment ____________. - ANSWER includes at least two groups, one of which does not receive the experimental treatment In trying to determine whether DNA or protein is the genetic material, Hershey and Chase made use of which fact? - ANSWER DNA contains phosphorus, whereas protein does not. In analyzi...

Bio 254 Final Exam Questions and Answers (Graded A)Bio 254 Final Exam Questions and Answers (Graded A)Bio 254 Final Exam Questions and Answers (Graded A)Bio 254 Final Exam Questions and Answers (Graded A) pathway of sperm -ANSWER testis→epididymis→ductus deferencs→ejaculatory duct→urethra What does FSH do in men -ANSWER Sperm production LH in men -ANSWER stimulates interstitial cells to produce testosterone LH in women -ANSWER triggers ovulation