Biology 1404 answers - Study guides, Class notes & Summaries

One possible results of chromosomal breakage is for a fragment to join a non-homologous chromosome. What is this alteration called? - -A translocation -Which of the following is true of linkage? - -The closer two genes are on a chromosome, the lower the probability that a crossover will occur between them -The chromosomal theory of inheritance explains what? - -Mendel's laws of segregation and independent assortment -If a deletion occurs on the Y chromosome that removes the SRY gene in...

1.Darwin referred to the process of promoting certain traits by breeding members with those traits as ____. The breeding of plants and animals to produce desirable traits. Organisms with the desired traits, such as size or taste, are artificially mated or cross-pollinated with organisms with similar desired traits. - -artificial selection -2.A morphological adaptation in which one species resembles another is called ____. - -Mimicry -3.Population decline causes an extreme genetic dr...

-Homologus Isolation Fossils - -preserved remains of ancient organisms -Georgraphic Isolation - -Population of speices becomes seporated by a physical boreder (mountains, rivers, land, etc.) - -structures that have diffrent mature forms but develop from same embryonic tissue -Temporal - -Isolated by time (open flower in winter, open flower in spring) -James Hutton - -Geologist who said that the forces that shaped the Earth took place over long periods of time, so the Earth had to be ...

What features are common to all living organisms? - -enclosed by a membrane presence of cytoplasm presence of DNA presence of ribosomes -How do electrons behave when they absorb or lose energy? - -Electrons move to higher or lower shells by absorbing (higher) or releasing (lower) energy -What is a nonpolar covalent bond? - -The atoms share the electrons equally -What is a polar covalent bond? - -One atom is more electronegative, and the atoms do not share the electron equally (crea...

what do biologist use to characterize and manipulate DNA molecules? how are sticky ends usefull in DNA fragments? restriction endonuclease;;;;; because DNA fragment from different sources but with the same complementary ends can be pasted together to form new hybrid molecules what is pBR322, that we used in lab? a plasmid which are small circular DNA molecule found in bacteria and yeast we did we do in lab to the pBR322 plasmid? we digested it in 3 different restriction enzymes ...

BIOLOGY 1404 EXAM CHAPTER 4-7 EXAM #2 REVIEW. BIO 1404 OPENSTAX CHAPTER 4-7 EXAM #2 REVIEW CH4 - Cell structure CH5 - Structure and function of plasma membranes CH6 - Metabolism CH7 - Cellular respiration CH4: Cell structure 4.1 A cell is the smallest unit of living things Levels of organization (simplest to complex): cells, tissues, organ, organ system, organism Cells are split into 2 categories: prokaryotic and eukaryotic Bacteria and archaea are PROKARYOTIC Both animal and p...

Most likely, mitochondria and chloroplast evolved from: - -Bacteria -What three overlapping processes are involved in development? - -Growth, morphogenesis and differentiation ------ is a type of ground tissue composed of cells having tick, often lignified secondary cell walls. - -Sclerenchyma -A mature sieve element does NOT normally have: - -A nucleus -The function of companion cells is thought to be: - -Delivery of substances to sieve-tube elements -Trichomes are: - -Appendages...

Gene expression - -The process by which DNA directs protein synthesis and has two stages - transcription - translation -Transcription - -the synthesis of RNA using information in DNA - produces messenger RNA (mRNA) -Translation - -the synthesis of a polypeptide using information in the mRNA -Ribsosomes - -the sites of translation -Translation in prokaryotes - -translation of mRNA can begin before transcription has finished (coupled) -Transcription in eukaryotes - -transcripti...

Which of the following can regulate protein expression in a cell? A. mRNA degredation B. Protein degredation C. RNA processing - -All of the above -Alternative RNA splicing allows for: - -Different mRNA molecules are produced from the same primary transcript -An operon may consist of which of the following: A. Promoter B. Genes C. Regulatory gene - -A & B: A promotor and genes -What is a protein produced by a regulatory gene? - -A repressor -For a repressible operon to be trans...