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Choose the most suitable answer. 1. Which of the following statements about Hemichordates is NOT true?...

Choose the most suitable answer. 1. Which of the following statements about Hemichordates is NOT true? 1. They are exclusively marine animals. 2. They have the typical tricoelomate structure of deuterostomes. 3. They belong to the phylum Chordata. 4. They have an open circulatory system. 5. The two well-known classes of hemichordates are Enteropneusta and Pterobranchia. 2. In sea stars the function of polian vesicles is to… 1. Store fluid and regulation of the internal pressure within the water-vascular system. 2. Eliminate excess salt from the body. 3. Produce pheromones. 4. Construct the wall of the water-vascular system. 5. Reduce photoreception. 3. The superphylum that contains Echinodermata and Hemichordata is called…. 1. Chaetognatha. 2. Ambulacraria. 3. Urochordata. 4. Echinasteria. 5. Dendrosteria. 4. The three classes of the subphylum Urochordata are… 1. Appendicularia, Cephalochordata and Larvacea. 2. Ascidiacea, Cephalochordata and Larvacea. 3. Ascidiacea, Thaliacea and Appendicularia. 4. Ascidiacea, Protochordates and Thaliacea. 5. Protochordates, Thaliacea and Larvacea. 5. Amphibian metamorphosis is regulated by... 1. Calcitonin hormone from the adrenals. 2. Thyroxine, a hormone secreted by the thyroid gland. 3. Estrogen and testosterone from the gonads. 4. Growth hormone by the thyroid gland. 5. Salt levels from the environment. 6. What marks the dorsal side of and ascidia body? 1. Incurrent siphon. 2. Excurrent siphon. 3. Atrium. 4. Endostyle. 5. The heart. 16 7. Appendicularians are also known as… 1. Thaliaceans. 2. Lancelets. 3. Larvaceans. 4. Latecilians. 5. Pterobranchs. 8. Neoteny means… 1. The retention of larval features in a sexually matured individual. 2. The loss of larval features in a sexually matured individual. 3. The acceleration of somatic development relative to sexual development. 4. The retardation of sexual development relative to somatic development. 5. None of the above. 9. The name “Urochordata” literally means… 1. Tail chordates. 2. Head chordates. 3. Kidney chordates. 4. Tunic chordates. 5. Larval chordates. 10. Hagfishes are… 1. Parasitic. 2. Predators and/or scavengers. 3. Omnivores. 4. Herbivorous 5. None of the above.

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Answer #1

Q1:- Option 3

Explanation:- Hemichordates belong to phylum chordal is wrong. They represent independent phylum.

Q2:-Option 1

Explanation:-:- Sea urchins the function of pollian vesicles is to regulate internal fluid pressure in the water vascular system.

Q3:-option 1

Explanation:- The superphylum that contains echinodermata and hemichordata is called ambulacraria.

Q4:- option 3

Explanation:- Three classes of urochordata are Ascidiacea, Thaliacea and Appendicularia

Q5:- Option 2

Explanation:- The metamorphosis in frog is regulated by Thyroxine, a hormone secreted by the thyroid gland.

Q7:- Appendicularia are also called Larvaceans

Q8:- Option 1

Explanation:- The retention of larval features in a sexually mature individual is called neoteny

Q9:- option 4

Explanation:- Urochordate means tunic chordates .

Q10:- option 2

Explanation:- hagfish is scavenger feed on caracasses

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