Question

what is one of the key abiotic factors in the hydrothermal vent environment?
very high salinity, and temperatures that can reach up to 752 degrees f
very low salinity
near - freezing temperatures.
low pressure
question 5
1 pts
which of the following is a key characteristic of the vulcanoctopus hydrothermalis (deep - sea octopus)
it lacks an ink sac, possibly because ink may not be useful in deep, dark, extreme habitats.
it lives in shallow water environments

Explanation:

First Question (Abiotic factor in hydrothermal vent environment)

Hydrothermal vents are in deep - sea, high - pressure environments with high - temperature (from the vent) and seawater - like salinity (high salinity). The boiling point of water at deep - sea pressure allows high temperatures (up to ~750°F is plausible for vent fluids). Low salinity, near - freezing temps, and low pressure don't match hydrothermal vent conditions. So the correct option is the one with very high salinity and high temp.

Vulcanoctopus hydrothermalis lives in deep - sea hydrothermal vent environments (dark, extreme). Ink sacs are used for defense in light - exposed or shallower waters; in deep, dark vents, ink is useless, so it lacks an ink sac. It doesn't live in shallow water (it's a deep - sea octopus). The “relies exclusively on filter…” option is incorrect as its feeding isn't filter - based. So the correct option is the one about lacking an ink sac.

Answer:

A. Very high salinity, and temperatures that can reach up to 752 degrees F

Second Question (Characteristic of Vulcanoctopus hydrothermalis)