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BSC 1005 LOWELL EXAM WITH QUESTIONS AND ANSWERS
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BSC 1005 LOWELL EXAM WITH QUESTIONS AND ANSWERS...
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BSC 1005 LO WELL EXAM WITH QUESTI ONS AND ANSW ERS What does a population mean? – ANSWER- a collection of members of the same species that reside in the same region A population evolves when? – ANSWER- When certain qualities are preferred above others What is meant by "allele frequency"? – ANSWER The frequency of alleles that may adapt What causes evolution to occur? -ANSWER A shift in the frequency of an allele What is the "fitness" of an organism? – ANSWER The capacity of an organism to endure and procreate in a specific setting The _________ chance of alleles being passed down to the following generation increases with fitness. ANSWER Increased The genotype, or set of alleles, of an organism determines its _________ - ANSWER Phenotype. Natural selection: what is it? – ANSWER individual differences in reproduction and survival within a population What triggers the occurrence of natural selection? - ANSWER external force Is it true that individuals evolve rather than populations? - ANSWER False Throughout time, populations undergo changes in ______ _________ - ANSWER Allele frequency What is the number of distinct natural selection patterns? - Third Answer Directional selection: what is it? - REPLY Predominant traits that are close to one extreme of the range Stabilising selection: what is it? - REPLY prominent characteristics at the centre of the spectrum Diversifying selection: what is it? - REPLY Phenotypes that are dominant lie on either extreme of the spectrum. Antibiotics: what are they? - REPLY substances that destroy bacteria What is resistance to antibiotics? - REPLY The capacity of a microbe to resist an antibiotic's effects How do bacteria proliferate? - REPLY Fission in binary systems Is reproduction in binary fission asexual or sexual? - REPLY Interracial Over _____ individuals in the US are killed by antibiotic-resistant germs every year. - ANSWER 23,000 What stages does binary fission involve? - ANSWER 1. DNA replication occurs when the cell elongates. 2. The plasma membrane and cell wall start to split 3. A cross-wall encircles split DNA. 4. Daughter cells divide What is the number of daughter cells generated in binary fission? - Second Answer How is antibiotic resistance able to develop? - REPLY Gene transfer or random mutation Gene transfer: what is it? - REPLY genes being transferred between bacteriaThe benefits of buying summaries with Stuvia:
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