Darwin studied actual birds on the Galapagos Islands instead of using a simulation, as you did In
this lab. Studying natural selection In the field can
be challenging. List at least three possible
challenges Darwin might have faced.

d.

explanation:

it's     c       this is a cell (b) with a nucleus (c) containing dna (a). the dna is organized into chromosomes (d). a section of the chromosome that codes for a trait is called a gene (e).

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint