Question

1. a species that absorbs nutrients primarily from the air rather than soil would likely be

an indicator species
a keystone species
a pioneer species
an endangered species

Explanation:

• Indicator species: These species are sensitive to environmental changes and are used to monitor the health of an ecosystem. They do not necessarily absorb nutrients from the air.
• Keystone species: These species have a disproportionately large effect on their environment relative to their abundance. Their role is not related to nutrient absorption from the air.
• Pioneer species: These are the first species to colonize barren environments. Many pioneer species, like lichens, can absorb nutrients (e.g., moisture, minerals) from the air (and also from dust and small particles in their surroundings) as they start the process of soil formation.
• Endangered species: These are species at risk of extinction. Their conservation status has no direct link to nutrient absorption from the air.

Answer:

a pioneer species