Variation and natural selection
prevents backflow into the left atrium
A, a node is where the different section either split or interconnect in a cladogram.
Answer:
In the African savanna, more wildebeests are born than the environment can support. Which is most likely to happen over a period of years as a result? Individuals that are well suited to the environment reproduce, and those that have lesser adaptations die before they reproduce.
Answer:
A nucleotide is the basic building block of nucleic acids.
Explanation:
RNA and DNA are polymers made of long chains of nucleotides. A nucleotide consists of a sugar molecule (either ribose in RNA or deoxyribose in DNA) attached to a phosphate group and a nitrogen-containing base.
Hope this helps even though it was yesterday :)
