The base pairs in a dna strand are held together with hydrogen bonds. in what way would a cell be most affected if these were covalent bonds instead? a. the cell would need to make new dna every time the strand was open b. the cell would be able to open and close the dna strand when it replicated c. the cell would have to take in and use in order to brake the covalent bonds d. the would need to replace the nutritious bases each time the dna strand opened.

Ascientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas which group of statements best describes all of the materials he is using in the investigation?

1. seamount a raised footwall block between normal fault creates this 2. syncline break between rocks where a hanging wall rises relative to a footwall 3. hot spring on rolling hills, this a dip between hills 4. volcanic neck created when a block with hanging walls slips down between normal faults 5. caldera underwater volcano that never reaches above sea level 6. horst natural hot water on earth's surface containing many minerals 7. graben underwater volcano whose top is eroded flat by waves 8. crater less than a mile in diameter; looks like a bowl at the top of a volcano 9. guyot magma that filled the central vent that remains after the volcano has eroded 10. reverse fault over 1 mile in diameter; looks like a bowl over a volcano

In meiosis ii during anaphase ii which structures separated homologous chromosomes or sister chromatids