Which of the following is a unit-vector? A) ( - o)/t B) /x ...

[lilldybug07]

Which of the following is a unit-vector?
 
  A) ( - o)/t
  B) /x
  C) v cos
  D) o + t
  E) sin2 + cos2

Question 2

What is one piece of evidence that some organelles like mitochondria and chloroplasts within eukaryotes used to be independent prokaryotes that were incorporated into eukaryotic cells?
 
  A) the DNA inside organelles is not made of the same four bases as the DNA in the host cells
  B) organelles float around independently inside eukaryotic cells
  C) prokaryotes are seen incorporating into cells today
  D) organelles are very similar to present-day bacteria, suggesting a common ancestor

[nanny]

Answer to Question 1

B

Answer to Question 2

D

[lilldybug07]

Gracias!

[shewald78]

Excellent