Biology, 17.04.2020 08:12, Estrella2209
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 02:50, andybiersack154
Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above
Answers: 2
Biology, 22.06.2019 04:30, kaciewelkerouwdfa
Plz fast biotechnology is a growing field of applied biology. many crops such as corn have been engineered to be resistant to herbicides. therefore farmers can spray these chemicals to kill weeds growing near the crop without worries of killing the crop itself how does this type of biotechnology work? a. by changing the genetic make up of the crops. b. by causing the crops to kill the weeds. c. by changing the type of crops used. d. by changing the location of the crops.
Answers: 1
Biology, 22.06.2019 07:30, ebookhardt917
The picture represents a structure of the respiratory system. which is the function of this structure? to bring air into the body to exchange oxygen with carbon dioxide to carry air to the lungs to release oxygen from the body
Answers: 1
Which of these sentences describe sources and preservation of genetic variation? Select all that app...
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