What is the nucleolus?

a. the membrane surrounding the nucleus
b. the entire dna found in a cell
c. an information organelle that makes protein
d. a ball of fibers inside the nucleus
i really need plz and

Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work)

Imagine that certain laws of physics could be ignored and you were able to travel vast distances in moments. now imagine that you traveled to an earth-like planet located light-years away that is known to support life. think about what you’ve learned in this unit and make an argument for what you think would be the dominant type of life form on this planet. consider whether a notochord is required for an organism to manipulate its environment and become a dominant creature.

Which phrase is the best summary of the model shown? a. the transfer of the sun's energy through trophic levels b. a series of aerobic and anaerobic reactions c. a transformation of light energy into chemical energy d. the breakdown of food molecules