In bryophytes, which of the following structures is like a root?
a. sporophyte
b. rhizoid
c. capsule
d. stalk

The correct answer is option B, that is, rhizoids.

Explanation:

Bryophyte is the collective term for hornworts, mosses, and liverworts. Bryology refers to the study of bryophytes. These are the spore-producing plants rather than the seed-producing plants and are devoid of flowers. Bryophytes do not possess true roots, they exhibit root-like anchoring compositions, known as rhizoids.  

Rhizoid is a thin and short filament found in plants like mosses and liverworts, which anchors the vegetative body of the species to a substratum that possesses the tendency of captivating nutrients. The prime function of rhizoids is to help the species of plants to absorb minerals, nutrients, and water.  

allowed for the prediction of the properties of missing elements.