Scin130 Study guides, Class notes & Summaries

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...

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...

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...

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...

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...

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...

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...

SCIN130 Chapter 8 Exam Questions with Correct Answers A mutation in a proto-oncogene can lead to the formation of a(n) - Answer-oncogene Mitosis produces - Answer-two genetically identical daughter cells. Arrange these stages in order from the start to end of mitosis. - Answer-(1) Prophase (2) Metaphase (3) Anaphase (4) Telophase The process of copying the entire set of DNA in a cell is called - Answer-DNA replication Tumor _____ genes code for proteins that inhibit the cell cyc...

SCIN130 Part 1 of 8 - Chapter 3 Questions with Answers

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...