Need answer !
which organelle is responsible for producing energy by the krebs cycle?
a) mitochondria
b) lysosomes
c) e. r.
d) nucleus
e) ribosomes

In matrix of the mitochondria, in a eukaryotic cell. So, your answer ia A.

This type of galaxy is an approximately ellipsoidal shape and a smooth, nearly featureless image. they are the largest single star systems, in the universe and are built by the collisions of many smaller galaxies.