Biology, 17.04.2020 21:12, kathlynskare06
Which of these sentences describe sources and preservation of genetic variation? Select all that apply.
A. Antibiotic resistance in bacterial populations is caused by natural selection of bacteria that inherit mutations that make them resistant to the antibiotics.
B. If a cell has two pairs of chromosomes, four kinds of gametes are possible as a result of reshuffling of chromosomes during meiosis.
C. Crossing-over causes a shuffling of allele combinations during meiosis as the alleles from each parent form new combinations on homologous chromosomes.
D. During mitosis in eukaryotes, the sister chromatids are separated and distributed to two daughter cells.
E. When two bacteria are linked during conjugation, the donor cell passes DNA to the recipient cell which causes genetic recombination.
Answers: 2
Biology, 22.06.2019 22:40, Spencerg325
Which of the following is true? a. under the current unemployment insurance system, benefits replace about 90 percent of the typical worker's prior pretax earnings. b. high benefit payments to unemployed workers will tend to increase the rate of unemployment. c. if a system of personal savings accounts replaced the current unemployment benefit system, the unemployment rate would fall to zero. d. the rate of unemployment in the large european economies has been persistently lower than that of the united states due to their more generous unemployment benefits.
Answers: 3
Biology, 23.06.2019 02:30, pollywallythecat
Angiosperms are the most successful terrestrial plants. which of the following features is unique to them and account for their success? a. fruits enclosing seeds b. wind pollination c. sperm cells without flagella d. embryos enclosed within seed coats e. dominant gametophytes
Answers: 2
Biology, 23.06.2019 06:30, jdiffenbaugh115
Which of the following points is not coplanar with points c, d and e?
Answers: 3
Which of these sentences describe sources and preservation of genetic variation? Select all that app...
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