Suppose there was a bird that always sat on a horse’s back and ate the insects that would bite the horse. What term would describe the relationship between the bird and the horse?

6. in the dna double helix, how are the two strands of dna held together? a. chemical bonds between base pairs hold the two strands of dna together. b. hydrogen bonds between the base pairs hold the two strands of dna together. c. hydrogen bonds between sugar groups and phosphate groups hold the two strands of dna together. d. chemical bonds between sugar groups and phosphate groups hold the two strands of dna together.

The cluster of developing cells from conception until birth is called an

As scientist had investigated evolution from a variety fields they have found