Column A 1. Useful for studying closely related species: Useful for studying closely related species 2. Model that uses mutation rates to measure evolutionary time: Model that uses mutation rates to measure evolutionary time 3. Useful for studying species in different kingdoms or phyla: Useful for studying species in different kingdoms or phyla Column B a. molecular clock b. ribosomal RNA c. mitochondrial DNA

i believe the correct answer is d

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

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.