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BSC 108 Exam #3 – Questions & Solutions (100%)

Formation of a new species is called - ️️speciation As a mechanism of evolution, natural selection can be most closely equated with - ️️unequal reproductive success What is NOT an example of natural selection? - ️️On a tree, leaves that grow in the shade are larger than those that grow in the sun Which of the following pairs of anatomical structures are homologous? - ️️bat wing and human arm A gene pool is - ️️All of the alleles in a population The smallest bio...

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BSC 108 -ALABAMA actual questions and answers Exam 1

how do new viruses arise - mutation of existing viruses spread to new host species what is the expected phenotypic ratio in the F2 generation from a true-breeding monohybrid cross? - 3 dominant to 1 recessive blood type is an example of - Multiple allele and co-dominance in humans, the _________ determines the sex of the offspring because ______________. - male... the male can either contribute an X or a Y chromosome ___________ is defined as an organism's expressed physical traits - p...

What is biology? - the scientific study of life What are the 3 domains? - Eukarya, Bacteria, Archaea What is the scientific process? - a formal process of inquiry What are the components of the scientific method? - observation, question, hypothesis, prediction, experiment, results What are the components of a good hypothesis? - should be specific; usually "if, then" statements What is a theory in science? - a broad and comprehensive statement about the world that is supported by the acc...

What is Biology? - The study of Life What are the 3 domains? - Eukarya Bacteria Archea What are the 4 kingdoms in Eukarya? - Protista Fungi Plantae Animalia. What are the properties of life? - Order Reguation Growth & development Energy processing Response to environment Reproduction Evolution How do you define something as living? - Have order Regulate themselves (homeostasis) Grow & develop Use energy Respond to environment ReproduceEvolve What is the scientific method? Kn...

doing all of the above ----introduced species can have important effects on biological communities by ________________________: preying upon native species competing with native species for resources reducing biodiversity doing all of the above favorable traits accumulate over time ----which can be inferred from natural selection? hybrid sterility tests ----all of the following are things used to determine relationships among organisms except: fossil evidence molecular evidence anatom...

What is microevolution? - The change in allele frequencies that occurs over time within a population. What is macroevolution? - Major evolutionary changes over time, the origin of new types of organisms from previously existing, but different, ancestral types. What is a species? - A group of populations whose members possess similar anatomical characteristics and have the ability to interbreed. What is allopatric speciation? - The formation of a new species in populations that are geographi...

The structure of a strand of DNA. - it is a double helix, like a twisted ladder. the ladder rings are nucleotide subunits and they have a covalent bond to the sugar phosphate backbone (made of deoxyribose and a phosphate group) What are the nucleotide subunits? - adenine, guanine, cytosine, and thymine How are the subunits held together? - through a hydrogen bond What are the nucleotide subunits compliments? - Adenine and thymine cytosine and guanine How does DNA replicate? - the parent s...

Describe the process of transcription. What are the starting molecules and the end products? - Transcription is the manufacture of a strand of RNA complementary to a strand of DNA. In initiation, RNA polymerase binds to a promoter region on the DNA strand. RNA synthesis occurs during the elongation phase as RNA nucleotides are added to the growing RNA polynucleotide. When the RNA polymerase reaches the terminator region of the gene, elongation stops and the polymerase and new RNA molecule d...