During which phase of the cell cycle is chromatin duplicated?

What links the two strands in a dna helix together in the middle? a. phosphate groups b. sugar rings bonded together c. proteins d. bases with hydrogen bonds

Agenus is a taxonomic grouping that identifies a collection of species. when a scientist discovers a new species, how is this species assigned to a genus

Which best describes a gene? a. a sister chromatid b. a chromosome c. a tetrad d. a piece of a chromosome