In a DNA molecule, what holds together nitrogenous bases from the two polymer chains?

A. phosphodiester bonds

B. ionic bonds

C. covalent bonds

D. peptide bonds

E. hydrogen bonds

Which of these nutrients can be found in all organic compounds? nitrogen calcium carbon phosphorous

What is global warming? What can people do to reduce global warming?

Renewable energy sources account for the majority of energy production.

Crossing of a homozygous wild type with a mutant that is heterozygous for a dominant mutation will result in F1 progeny of whichA) all show the mutant phenotype. B) half show the wild-type phenotype and half show the mutant phenotype.

A metal coin has certain properties that can be measured which property of a coin is different on the moon than it is on earth? A. density B. mass C. volume D. weight

What type of asteroid/meteorite do they believe brought some water to the Earth? a. Stoney Iron b. Iron c. Steel d. Carbonaceous Chondrite

If a cell has 12 chromosomes, how many chromosomes will each of its daughter cells have after mitosis and cytokinesis? and can u explain because i dont understand

A lab technician runs the results of a simple PCR reaction through a gel electrophoresis to test a sample of imported hamburger meat for the presence of a DNA sequence that is known to be found in kangaroos and not in cows.

If Earth was not titted on its axis, what changes would you expect to see in the seasons?

Why are organelle important for cell homeostasis