Use the information about glowing jellyfish and your knowledge of science to answer the questions.

Question

Glowing Jellyfish

Jellyfish and comb jellies have existed in both cold and warm ocean water for more than 500 million years. These two types of organisms have many similar features even though jellyfish and comb jellies are not closely related. Some jellyfish and comb jellies can even produce and emit light, as shown in Photograph 1.

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These organisms glow because of a process known as bioluminescence. During this process, a chemical reaction produces light energy that the organism can then emit. A substance known as a luciferase helps a luciferin molecule release this light energy as it reacts with oxygen. In some comb jellies, this chemical reaction is activated when calcium is present. The bioluminescence chemical reaction is shown in Figure 1.

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Bioluminescence can occur in different ways, depending on the organism, but a few factors are common to all bioluminescent organisms. For example, oxygen is a reactant that is always needed. This element is absorbed through the thin cell membranes of the organism. Table 1 summarizes how bioluminescence can be used in different ways.

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Scientists are studying the genes needed for bioluminescence in comb jellies. In one experiment, a researcher injected the DNA needed for bioluminescence into eight rabbit embryos. The embryos were then placed back inside the mother, where they developed normally. When the eight rabbits were born, it was found that two of them had the ability to bioluminesce. Scientists suggest that similar bioluminescent products will soon be possible for human use.

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A large population of comb jellies was found living in an area with a large food source. After a long period of overfishing, the food source in the area significantly decreased. Scientists want to build a model to describe how the change in the availability of food may affect different types of comb jellies in the population.
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​ Drag the statements into the correct order to complete the outline for the scientists' model.
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​Each statement will be used once.
DRAG & DROP THE ANSWER
Comb jellies that slow glow will attract more prey than comb jellies that do not slow glow.
Some comb jellies in the population carry genes for producing a slow glow of light.
The slow-glow genes will get passed on to future generations of comb jellies.
Slow-glowing comb jellies will be more likely to survive and reproduce.
Note: Use CTRL+D to drag the option via keyboard

Answer 1

To complete the outline for the scientists' model on how the change in the availability of food may affect different types of comb jellies in the population, the statements can be arranged in the following order:

1. Some comb jellies in the population carry genes for producing a slow glow of light.
2. Comb jellies that slow glow will attract more prey than comb jellies that do not slow glow.
3. Slow-glowing comb jellies will be more likely to survive and reproduce.
4. The slow-glow genes will get passed on to future generations of comb jellies.

This order logically explains the allele presence, its effect on prey attraction, the survival and reproduction success, and the passing of genes to future generations.