Multiple Choice
Which clade is most directly related to lancelets?
62
views
1. Introduction to Biology
Introduction to Taxonomy
Struggling with General Biology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which animal group is sessile, is often very colorful, and has tentacles with nematocysts?
A
Sea anemones (Phylum Cnidaria)
B
Mollusks (Phylum Mollusca)
C
Flatworms (Phylum Platyhelminthes)
D
Sponges (Phylum Porifera)
Verified step by step guidance1
Understand the term 'sessile': Sessile animals are those that are fixed in one place and do not move actively. This characteristic helps narrow down the options.
Learn about nematocysts: Nematocysts are specialized stinging cells used for defense and capturing prey. These are unique to animals in the Phylum Cnidaria.
Analyze the options: Sea anemones belong to Phylum Cnidaria and are sessile, colorful, and possess tentacles with nematocysts. Mollusks, flatworms, and sponges do not have nematocysts.
Review the characteristics of sponges (Phylum Porifera): Sponges are sessile but lack tentacles and nematocysts. They use filter feeding instead of stinging cells.
Conclude that the correct answer is Sea anemones (Phylum Cnidaria), as they match all the described traits: sessile, colorful, tentacles, and nematocysts.
2:23mWatch next
Master Introduction to Taxonomy with a bite sized video explanation from Jason
Start learningRelated Videos
Related Practice
Introduction to Taxonomy practice set
Problem sets built by lead tutorsExpert video explanations