Which of the following is true of rna compared to dna?
a. it lacks phosphate groups.
b. it is a single-stranded molecule.
c. its nucleotides do not have sugars.
d. it contains four different nucleotides.

Once a woman attains puberty, her overuse mature and release one egg per ovarian cycle. which hormone stimulates this event?

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction. this is an example of speciation.

What best describes lactic acid fermentation?