Question

1. How are algae and polyps related?

The polyps receive carbon dioxide from the algae.

The polyps embed themselves in the flesh of the algae.

The polyps get most of their food from the algae.

The polyps receive shelter from the algae.

2. Which word best describes the relationship between polyps and algae?
bleached

photosynthetic

exoskeletal

symbiotic

3. The definition of symbiotic is
having a hard external covering.

consisting of two oxygen atoms.

living in close association.

having tiny tentacles.

4. What happens to algae when the temperature in the ocean becomes too hot?
The algae become pale.

The algae photosynthesize faster.

The algae lose their ability to photosynthesize.

The algae are susceptible to infection.

Answer 1

Algae and polyps have a symbiotic relationship, wherein polyps get most of their food from algae, and in return, provide shelter and nutrients. This association is termed symbiotic. Increased ocean temperatures can cause algae to lose their photosynthetic ability, leading to coral bleaching.

Step-by-step explanation:

Relationship Between Algae and Polyps

The relationship between algae and polyps is that polyps obtain most of their food from the symbiotic dinoflagellate algae known as zooxanthellae. These algae reside within the polyps, conducting photosynthesis and providing nutrients to the host. In return, the polyps provide a protected environment and nutrients necessary for the algae's photosynthesis. This mutualistic interaction is fundamental for the reef-building process, as it allows corals to deposit calcium carbonate, which forms coral reefs.

Characteristics of the Relationship

The symbiotic association between polyps and algae is symbiotic, which is characterized by the close and often long-term interaction between two different biological species. The term symbiotic fits the description of their relationship as both organisms benefit from this close association. The exchange of nutrients and shelter between the two is a classic example of mutualism, a type of symbiosis.

Consequences of Temperature Increase in the Ocean

When ocean temperatures rise too high, the algae known as zooxanthellae are adversely affected. The stress caused by increased temperatures can lead to a loss of the algae's ability to photosynthesize, resulting in coral bleaching. Bleached corals, devoid of their colorful algae, are weaker and more susceptible to death if stressful conditions persist.