Question

name: bella f.

1. each of the illustrations below shows either a prokaryotic cell or a eukaryotic cell. each cell is numbered.

a. 1 and 2 b. 1 and 3 c. 2 and 4 d. 3 and 4

1. both euglena and cyanobacteria are photosynthetic unicellular organisms found in pond water. the feature that distinguishes euglena from cyanobacteria is the —

a. ability to maintain homeostasis
b. presence of ribosomes
c. ability to reproduce
d. presence of a nucleus

Explanation:

1. Prokaryotic cells lack a nucleus and membrane - bound organelles, while eukaryotic cells have a nucleus and membrane - bound organelles. Cells 3 and 4 appear to be prokaryotic (lacking a defined nucleus), and cells 1 and 2 appear to be eukaryotic (with a defined nucleus).
2. Euglena is a eukaryote and cyanobacteria is a prokaryote. The main difference between them is that eukaryotes like euglena have a nucleus, while prokaryotes like cyanobacteria do not. Homeostasis, ribosomes, and reproduction are features common to both.

Answer:

1. A. 1 and 2
2. D. presence of a nucleus