Just imagine for a moment that nasa's curiosity rover that landed on mars in the summer of 2012 finds evidence of life at the cellular level on mars. imagine that their initial observations show that this martian cell has a nucleoid region and also a cell wall, and measures 7 microns in diameter. conclude what you can about this cell. check all that apply. a. it is a prokaryote
b. it is a eukaryote
c. it must cause disease
d. it is a virus
e. it shares characteristics with cells on earth

Answer is A and E.

Explanation:

Nucleoid means nucleus-like and it is irregular center of prokaryotic cells and it doesn't have any membrane. 7 microns diameter is not necessarily a prokaryote attribute and they usually range from 0.1 to 5 microns while eukaryotic cell range from 10 to 100 microns in diameter. You just need to memorize that prokaryotes generally smaller than eukaryotes. (Fun fact smallest eukaryotic organism Ostreococcus only measures 0.8 microns across. It is also not a virus since this organism have cell wall and nucleoid. Our theoretic cell also shares characteristics with cells on Earth such as cell wall and nucleoid. And we can't say "it must cause disease" without knowing other attributes and evidence is insufficient.

1) gene flow

- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.

-a zebra migrates to join a different herd of zebras.

2) natural selection

- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.

-competition for sunlight leads to taller trees.

3) mutation

- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.

-the dna of a snake changes to make its venom stronger.

4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.    

-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.

explanation: