Scin130 - Study guides, Class notes & Summaries
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SCIN130 Chapter 16 exam questions fully solved & updated
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Macroevolution 
changes in a population over very long periods of time. 
 
 
 
Speciation 
the splitting of one species into two or more new species 
 
 
 
Biological Species Concept 
offers testable way to define a species that does not depend on appearance: 
The members of a species interbreed and have a shared gene pool, & each species is reproductively isolated from every other species. 
Gene flow occurs between the populations of a species, but not between pops of diff species. 
 
 
 
Biolo...
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APUS CLE SCIN130 B011 Quiz 5 / Latest 2024
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Part 1 of 7 - Chapter 9 27.0 Points 
Question 1 of 31 
How is it possible that multiple sites of DNA replication can exist inside the cell? 3.0 Points 
A. there are multiple origins of replication 
B. there are not multiple sites of replication 
C. during cytokinesis, DNA is replicated at twice the rate 
D. genes are replicated quickly, so there are usually >4 of one gene at a time 
Because the strands of DNA run anti-parallel, Okazaki fragments results. Read more on DNA replication 
in Chapt...
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SCIN130 Chapter 15 exam questions fully solved & updated
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Natural Selection 
the process that results in adaptation of a population to the biotic and abiotic environments. 
 
 
 
Polygenic 
controlled by more than one pair of alleles located at different gene loci 
 
 
 
Directional Selection 
occurs when an extreme phenotype is favored and the distribution curve shifts in that direction. Example: resistance to antibiotics and pesticides 
 
 
 
Stabilizing Selection 
Occurs when an intermediate phenotype is favored. Individuals near the average are fav...
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AMU SCIN130 Quiz 1: Chapters 1, 14, 15, and 16 exam questions fully solved & updated
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Scientists were studying temperature selection among pregnant big brown bats. What would the treatment group be in this experiment? 
pregnant bats 
 
 
 
A scientist discovers a new application for a common medical procedure that involves taking tissues from one patient and placing them into another patient. The procedure always results in a full recovery for the patient receiving the tissue but results in long-term disability for the donor 10% of the time. According to bioethics, making the dec...
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2025 |SCIN130 WEEK 5 QUIZ - Introductory BiologyTHIS IS A TREND SETTER FOR THE TREADLINE REGRESSION MODEL SHOWN IN EXCEL SPREADSHEET|QUESTIONS AND CORRECT ANSWERS
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2025 |SCIN130 WEEK 5 QUIZ - Introductory BiologyTHIS IS A TREND SETTER FOR THE TREADLINE REGRESSION MODEL SHOWN IN EXCEL SPREADSHEET|QUESTIONS AND CORRECT ANSWERS
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AMU SCIN130 Quiz 2: Chapters 4, 8, 9, 10, and 11 exam questions fully solved & updated
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What must materials pass through to enter or leave a cell? 
plasma membrane 
 
 
 
Plant cells can communicate with each other via ________, as indicated by the arrow in the figure. 
plasmodesmata 
 
 
 
Which structures determine the flexibility of the extracellular matrix? 
proteins 
 
 
 
A tadpole that is undergoing metamophosis into a frog and losing the need for a tail would see abundant numbers of what organelle to help assist in the tail loss. 
lysosomes 
 
 
 
Identify the organelle - f...
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SCIN130 Chapter 16 UPDATED ACTUAL Questions and CORRECT Answers
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SCIN130 Chapter 16 UPDATED ACTUAL 
Questions and CORRECT Answers 
Which of the following is/are an example(s) of a postzygotic isolating mechanism? - 
CORRECT ANSWER- Hybrid sterility 
Zygote mortality 
Two different species attempt to reproduce, but their offspring is unable to undergo proper 
mitosis because it has two different sets of chromosomes. This type of reproductive barrier is 
best described as __________ mortality. - CORRECT ANSWER- zygote
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SCIN130 Chapter 16 Exam Questions and Answers 100% Pass
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SCIN130 Chapter 16 Exam Questions and 
Answers 100% Pass 
Which of the following is/are an example(s) of a postzygotic isolating mechanism? - 
Answer-Hybrid sterility 
Zygote mortality 
Two different species attempt to reproduce, but their offspring is unable to undergo 
proper mitosis because it has two different sets of chromosomes. This type of 
reproductive barrier is best described as __________ mortality. -Answer-zygote 
The evolutionary history of a group of organisms is called _____. -An...
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SCIN130 Chapter 16 Exam Questions and Answers
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SCIN130 Chapter 16 Exam Questions and Answers 
 
Which of the following is/are an example(s) of a postzygotic isolating mechanism? - Answer-Hybrid sterility 
 
Zygote mortality 
 
Two different species attempt to reproduce, but their offspring is unable to undergo proper mitosis because it has two different sets of chromosomes. This type of reproductive barrier is best described as __________ mortality. - Answer-zygote 
 
The evolutionary history of a group of organisms is called _____. - Answe...
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SCIN130 Chapter 15 Test Questions with Correct Answers
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SCIN130 Chapter 15 Test Questions with Correct Answers 
Natural Selection - Answer-the process that results in adaptation of a population to the biotic and abiotic environments. 
 
Polygenic - Answer-controlled by more than one pair of alleles located at different gene loci 
 
Directional Selection - Answer-occurs when an extreme phenotype is favored and the distribution curve shifts in that direction. Example: resistance to antibiotics and pesticides 
 
Stabilizing Selection - Answer-Occurs wh...
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