1. Hypothesize in what type of environments it would be advantageous for a protist to be autotrophic, heterotrophic, or mixotrophic.

See below

Explanation:

Protists fall into the category of eukaryotes. They are diverse in nature and typically are found to be single celled organisms containing very organized structures.They are classified based on what is their source of nutrition.

Autotrophic - capable of photosynthesis to produce their own food, so an environment where sunlight, CO2 and water is available.

Heterotrophic - feed on other organisms , an environment where prey is plenty and very limited or no access to sunlight.

Mixotrophic - a combination of the above two, an environment with all of the aforementioned factors present.

the element that provides strength to the exoskeletons of clams and oysters is phosphorus. this is so because calcium carbonate is the main component in the shells.

explanation:

one is through turgidity. this occurs before ground tissue ( collenchyma

and sclerenchyma cells) become well

developed to give structural support to the plant as it grows bigger. the xylem

tissue (composed of rigid tissue) of the young

plant render this support and also maintaining osmotic turgidity of the surrounding

plant cells.