Dna is made of two chains of nucleotides. which type of bonds hold the chains together?

Which feature of a human community is similar to a niche in a biological community

The lineage of pea plants produced round seeds for four generations. the plants that fertilized these pea plants also produced round seeds. however, in the fifth generation, the plant produced to two plants with wrinkled seeds. can that be possible?

Which organism in this food web is an omnivore?coati