Answer:
Euglena are classified into the Kingdom Protista, and the Phylum Euglenophyta.
Explanation:
A single human B cell can produce only D. 1 antibody.
It produces a single species of antibody, with unique antigen-binding site.
In case of Jamaal's task, the memory system which is most important is WORKING MEMORY SYSTEM or SHORT-TERM MEMORY SYSTEM.
In case of humans, there are 3 typed of memories:
1. Sensory memory
2. Short-term memory (Working memory)
3. Long-term memory (Life time memory)
Since in the above question, Jamaal needs to memorize the phone numbers for a short period of time, it is an example of short-term memory.
C robert hooke
E matthias schleiden
B theodor schwann
hope this helped!!