The oxygen cycle is closely related to which other cycle? A. The carbon cycle
B. The nitrogen cycle
C. The phosphorus cycle

Agene in a type of bacteria when the ses bacteria reproduce asexually this mutation can only be inherited by

How do you transfer mrna into codons ? i'm so confused : (

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2