The "backbone", or sides, of the dna molecule are made of

a. cytosine.

b. nitrogenous bases.

c. hydrogen bonding.

d. sugar and phosphate.

which of the following are environmental factors that can influence whether someone develops alzheimer's disease?

Just a random question why are pigs pink

Which biomolecule is the most important

In humans the allele for hemophilia h is recessives which is displayed in an individual with the genotype x y

list two foods that are high in carbohydrate, two that are high in fat, and two that are high in protein

4. what is the p-wave shadow zone and what causes it

Speciation generally requires - Select all that apply A) isolation of populations B) genetics of divergence C) geographic isolation

Which example best represents balanced forces? an elevator stopped on the third floor a basketball shot into a hoop a sled sliding down a snowy hill a tow truck pulling a car out of a ditch

What is the dynamic between a lion and a zebra?

Students planted three bean seeds after several days, they observed that the seeds' roots were growing downward into the soil which type of tropism were the roots displaying A. Geotropism B. Thigmotropism C. Phototropism D. Photoperiodism