Suppose scientists study mutant bacterial strains of staphylococcus aureus to find the order of the genes for tetracycline resistance (gene t), streptomycin resistance (gene s), erythromycin resistance (gene e), and penicillin resistance (gene p). they extract dna from bacterial strains with one or more of these mutations and transform wild‑type bacterial cells (s+, e+, t+, p+) with the dna. given that the p mutation is first, indicate the order of these bacterial genes within the genome according to the transformation experiment results.

the answers are as following:

1. c. double helix, nucleosome, coil, supercoil, chromosome

2. b. g2 phase, preparation for mitosis

3. d. interphase consists of the g1, s, and g2 phases

4. c. metaphase

5. a. chromosomes are duplicated before cell division so that each new daughter cell has a complete set

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.

ice cream

explanation: