REPRODUCTION (either sexual or asexual) is found in all unicellular organisms.
I am pretty sure the answer is D (combination)
Answer:So yes,humans and other mammals (like dogs) have same immune system. Differences may occur in the protein structures, but they all come in same family and work similarly like humans.
Explanation: Are animal immune systems different from humans? - Quora
https://www.quora.com/Are-animal-immune-systems-different-from-humans
The geologic time scale is a system of chronological dating that relates geological strata to time, and is used by geologists, paleontologist, and other Earth scientists to describe the timing and relationships of events that have occurred during Earth's history. Hope I helped!
