Question

add a comma or semicolon if needed. otherwise, submit the text without any additional punctuation. some plant species have spines to protect themselves or use chemical deterrents to repel insects.

Explanation:

We need to add punctuation (a comma or semicolon) to the sentence "Some plant species have spines to protect themselves or use chemical deterrents to repel insects". The two actions "have spines to protect themselves" and "use chemical deterrents to repel insects" are parallel and of equal importance. A comma is used to separate two independent clauses or in a list. Here, it's a list of ways plants protect themselves, so a comma is appropriate.

Answer:

Some plant species have spines to protect themselves, or use chemical deterrents to repel insects.