Question

article, the author explores bioluminescent organisms.
es dot the twilight sky like sparks above a verdant meadow, languid jellyfish
softly as they glide slowly through the oceans depths, and tiny algae shimmer
handfuls of glitter on the surface of inky black water on a dark night. what gives
these creatures the ability to diffuse their own light, and what purpose does it serve?
the scientific answer to that question is found in a chemical reaction called
bioluminescence. this reaction creates a light within the body of certain organisms,
and its purpose can be one of several: to see or attract prey, to entice a mate, or to
communicate. these functions contribute to one essential concern for all living
things: survival.
assessment questions
what are the author’s two main purposes in the text?
a. to explain how humans discovered bioluminescent organisms
b. to describe how scientists have studied bioluminescent organisms
c. to explain how organisms have changed over time to produce light
d. to explain the processes by which some organisms can produce light

Explanation:

• Option A: The text does not focus on how humans discovered bioluminescent organisms, so A is incorrect.
• Option B: The text mentions the scientific study (like the chemical reaction of bioluminescence) which implies describing how scientists study these organisms, so B is valid.
• Option C: The text does not discuss the evolution of organisms over time to produce light, so C is incorrect.
• Option D: The text explains the chemical reaction (bioluminescence) which is the process by which some organisms produce light, so D is valid.

Answer:

B. to describe how scientists have studied bioluminescent organisms, D. to explain the processes by which some organisms can produce light