What is an Amoeba

Explain

An amoeba (/əˈmiːbə/; less commonly spelled ameba or amœba; plural am(o)ebas or am(o)ebae /əˈmiːbi/),[1] often called an amoeboid, is a type of cell or unicellular organism which has the ability to alter its shape, primarily by extending and retracting pseudopods.[2] Amoebae do not form a single taxonomic group; instead, they are found in every major lineage of eukaryotic organisms. Amoeboid cells occur not only among the protozoa, but also in fungi, algae, and animals

An amoeba, often called an amoeboid, is a type of cell or unicellular organism which has the ability to alter its shape, primarily by extending and retracting pseudopods.

Explanation:

my chapter name is cell structure so I m learning about amoeba xd

the answer is a or when it says crossing over

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.