Which of the following is true for the nucleus? a) it has no definite structure b) it is surrounded by membrane c) it is the eukaryotic cell's energy-producing organelle
d) it is closely associated with the golgi apparatus.
e) it is always bluish purple in colour

Which organelle breaks down sugar molecules that supply energy to the cell ?

Cladistics is a way of classifying organisms by examining the characteristics of their ancestors and descendants and depicting the relationships in a cladogram. which of the following best describes a challenge in classifying organisms this way? a. there are millions of species on earth, and a cladogram is not a practical means for classifying all of them. b. it is impossible to tell which organisms are most closely related to each other using a cladogram. c. cladograms are detail-oriented and do not provide a useful understanding of evolutionary relationships. d. there is a limited number of ways to organize the information, so most cladograms end up looking very similar.

Which of the following are responsible for sending messages from the hypothalamus to the thalamus?