TASK DEFINITION: In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.
PROBLEM: Question: What are unique in having adaptive immunity in addition to innate immunity? Answer: vertebrates

SOLUTION: Vertebrates are unique in having adaptive immunity in addition to innate immunity.

PROBLEM: Question: Only about one percent of plants have lost what ability, turning them into consumers and even predators, instead of producers? Answer: photosynthesis

SOLUTION: Only about one percent of plants have lost photosynthesis ability, turning them into consumers and even predators, instead of producers.

PROBLEM: Question: What results when birth rates fall even lower than death rates? Answer: negative growth rate

SOLUTION:
Negative growth rate results when birth rates fall even lower than death rates.