Biology b primavera - Study guides, Class notes & Summaries

Primavera Biology/checkpoint 13 Questions and Answers 100% Pass Which procedure would help ensure that a new piece of DNA can be inserted inside a bacterial plasmid when the two are mixed together? The fragment and plasmid are both cut with the same restriction enzyme. Which sentences correctly describe restriction enzymes? Select all that apply. They cut DNA strands at specific locations. In bacteria, they function to cut up the DNA of invading viruses A biologist wishes to take a useful ge...

CHECKPOINT 22 Which describes symbiosis? correct answer: Two organisms belonging to different species live closely together and have specific interactions. What is the most specific ecological level? correct answer: an organism A tick feeding off the blood of a dog is an example of which type of relationship? correct answer: parasitism In which of the following situations would primary succession occur? correct answer: on an island just formed by a volcano Which of the followin...

CHECKPOINT 17 What gas present in today's atmosphere was largely absent from early Earth's atmosphere? correct answer: oxygen What are some possible sources for early organic molecules? Select all that apply. correct answer: existing inorganic molecules forming into more complex organic ones by using energy from lightning simple inorganic compounds arriving on Earth through meteorites or other objects Which option correctly replaces X and Y? The Miller-Urey experiment resulted...

CHECKPOINT 12 Genes located close together on a chromosome tend to be inherited together. What is this called? correct answer: genetic linkage Which of the following genes are linked in pea plants? correct answer: flower color and pollen-grain shape A Punnett square incorrectly predicts the outcome of a dihybrid cross. There are only two phenotypes in the F2 offspring instead of four. Why? correct answer: The genes are completely linked. A Punnett square predicts that the ratio of ...

CHECKPOINT 07 Which correctly describe a part of the DNA molecule and what the part is made of? Select all that apply. correct answer: rungs—bases backbone—a phosphate group and a sugar A scientist is trying to determine if a nucleic acid is RNA. What features should the molecule have? Select all that apply. correct answer: a single strand the sugar ribose Why is DNA antiparallel? correct answer: Its double strands run in opposite directions. Which of the following base...

PRIMAVERA BIOLOGY B what factors affect carrying capacity ? select all that apply . - Answer- - presence of disease - quality of habitat - predators in habitat if there is no immigration or emigration , how do the birth rate and the death rate affect population size ? select all that apply . - Answer- - when the birth rate and the death rate remain the same , the population size does not change . - when the death rate exceeds the birth rate , the population shrinks . which of the f...

Which of the following are the correct base pairs that are found in DNA? Select all that apply. correct answer: A-T C-G What are some functions of RNA? Select all that apply. correct answer: is part of the structure of ribosomes serves as a temporary mobile copy of the DNA's instructions brings amino acids to the ribosome What is true for DNA but not for RNA? Select all that apply. correct answer: It has a double-stranded helix structure. It stores genetic information fo...

A plant has red flowers. In this species, a red flower color is the dominant trait over a white flower color. What can you say about this plant? correct answer: If the genotype is Rr, the phenotype will be red-flowered. Which observation led Mendel to the idea that traits were controlled by more than a single factor? correct answer: A trait that was not seen in the first generation may later reappear in the second generation. The two different X in Y individuals plays a role in increasi...

Which of the following are the correct base pairs that are found in DNA? Select all that apply. - correct answer A-T C-G What are some functions of RNA? Select all that apply. - correct answer is part of the structure of ribosomes serves as a temporary mobile copy of the DNA's instructions brings amino acids to the ribosome What i

PRIMAVERA BIOLOGY B UNIT 4 EXAM Which option correctly describes how Earth's temperature has changed during its history? - Answer- Earth was initially very hot. It gradually cooled down. Which theory suggests that life on Earth originated from microbes carried to Earth by meteorites or comets? - Answer- panspermia What summarizes the RNA world hypothesis? - Answer- RNA was the first biomolecule to evolve and did so before DNA and proteins. Which options describe Darwin's theory...