As a biologist studying dinoflagellates (a type of protist) from local oceans, you notice that the chloroplast is surrounded by four membranes. You also notice that the chloroplast shares many characteristics with red algae, and you find circular DNA closely related to cyanobacteria DNA. From this, you hypothesize that this lineage of dinoflagellates was the result of

d

explanation:

the answer is d. chordata

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

the food storage products of chrysophytes are oils or the polysaccharide laminarin.   formerly classified as plants, the chrysophytes contain the photosynthetic pigments chlorophyll a and c all but the yellow-green algae also contain the carotenoid pigment fucoxanthin.