Question

what is the unique physical characteristic of the green sea turtle, as specifically noted in the presentation among sea turtles?
they have a comparatively small head.
their shells are dark brown, grey, or olive colored.
they weigh 300 to 350 pounds.
they are the largest hard-shelled sea turtle.
question 21
1 pts
which of the following is listed as a human activity or event that affects seagrass meadows?
coastal engineering
oil drilling platforms.
plastic micro - beads pollution.
deep - sea trawling

Explanation:

First Question (Green sea turtle's unique physical characteristic):

To determine the unique physical characteristic of Green sea turtles among sea turtles, we analyze each option:

• "They have a comparatively small head": Not a unique trait specific to Green sea turtles among sea turtles.
• "Their shells are dark brown, grey, or olive colored": Shell color is not a unique distinguishing feature for Green sea turtles among all sea turtles.
• "They weigh 300 to 350 pounds": Weight range is not a unique defining characteristic compared to other sea turtles.
• "They are the largest hard - shelled sea turtle": This is a well - known unique physical characteristic of Green sea turtles among sea turtles.

To find the human activity affecting seagrass meadows, we analyze each option:

• "Coastal engineering": Activities related to coastal engineering (like building sea walls, harbors etc.) can directly impact seagrass meadows by altering the coastal environment, sedimentation, and water flow.
• "Oil drilling platforms": While oil - related activities can impact marine environments, oil drilling platforms are more associated with open - ocean or specific offshore areas rather than directly targeting seagrass meadows as a primary impact.
• "Plastic micro - beads pollution": Plastic micro - beads are a form of pollution, but they are more related to general marine pollution in a broader sense and not a primary human activity targeting seagrass meadows.
• "Deep - sea trawling": Deep - sea trawling occurs in deep - sea areas, far from seagrass meadows which are in coastal or shallow marine areas.

Answer:

D. They are the largest hard - shelled sea turtle.

Second Question (Human activity affecting seagrass meadows):