1. a dna strand is made up of how many strands of nucleotides?
2. name one way that dna and rna differ.
3. nitrogenous bases are held together by what type of bond?

Answers:

1. 2 strands. (known as polynucleotide)

2. DNA is double stranded while RNA is single stranded.

3. Hydrogen bonds.

There are four types of them;

• Adenine and Thymine are double H-Bonds.

• Guanine and Cytosine are triple H-Bonds.

Additional:

Other Differences between DNA and RNA:

•DNA contains the sugar deoxyribose, while RNA contains the sugar ribose.

• DNA is stable under alkaline conditions while RNA is unstable.

•DNA is responsible for storing and transferring genetic information while RNA directly codes for amino acids and acts as a messenger between DNA and ribosomes to make proteins.

I hope it's helpful :)

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d