What does the term ' natality ' actually mean ?

Ablastocyst is a group of cells that forms after a human egg is fertilized. the blastocyst consists of two types of cells. some of these cells will become the placenta. what do the other cells develop into?

Nucleic acids offer variability because they contain alternate forms of genes called .

What two factors does carrying capacity compare? population size and resource use population growth and resource availability resource use and time population size and time