The rungs or steps of dna are made up of which are attached to the sides or railings of dna, which are made up of

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

If two parents who's blood types are both b produce a child that has blood type o, what can you say about the parent's genotybes? oa) one is ii ob) one is ibi oc) both are bi od) nothing, this is impossible

What type of organism is a one-celled organism that functions as a single unit? a. bi-celled b. single-celled c. pre-celled d. multi-celled