Fill in the Blank (Ipoint each) occurs when larva undergoes a major change of bo

Question

Fill in the Blank (Ipoint each) occurs when larva undergoes a major change of body form. 2. Most animals are (backbone). so called because they lack a vertebral column 3. A is completely lined by tissue derived from the mesoderm. 4. occurs when the transition from larva to adult is achieved through multiple molts, but without forming a pupa. 5. The modular body plan of an insect consists of three body parts: and 6. Insects are the most successful group of animals because of their and 7. As representatives of classes of mollusks, an octopus is an example of a garden snail is an example of a and a clam is an example of a 8. Animals have or symmetry 9. (grouping) includes the largest number of species. 10. Characteristics of a dorsal, hollow nerve cord, notochord, pharyngeal slits, and a muscular past-anal tail are found in phylum

Explanation / Answer

1. metamophosis- The larva passes through different stages in life by molting or shedding its skin until it reaches an adult insect. There is incomplete metamorphosis (3 stages in life- eggs, naiads and adult) and complete metamorphosis (4 stages in life- egg, larvae, pupa and adult).

2. Invertebrates

They lack vertebral column. eg: phylum porifera, mollusca, athropoda. Animals with vertebral column are called vertebrates. eg: phylum vertebrata including humans,

3. Coelom

Coelomates are animals with body cavity, (betwwen the body wall and the gut), which develops within the mesoderm. The body cavity or coelom is completely lined with tissue derived from mesoderm. And it is enclosed on the outside and inside by muscles. eg: molluscs, arthropods, echinoderms and chordates.

4. wings and reproductive organs occurs when the transition of larva of cockroaches, crickets and bed bugs to adult is achieved. They donot undergo a pupal stage. The larva is just similar to the adult except that the larva is small in size, and without wings and reproductive organs.

5. head, thorax and abdomen include the parts of modular body plan. This body plan is followed by insects which are the successful group of life forms on earth. Homoetic genes act to develop their adult body parts- exoskeleton and appendages- to form by the fusion of embronic segments identical to each other. These embryonic segments develop independently.

6. small size, reproductive potential and ability to fly make the insects for their dispersal and diversity to be most successful groups on earth.

7. octopus is an example of cephalopod mollusk, garden snail is an example of gastropod mollusk. Clam is an example of bivalve mollusk.

8. Animals have bilateral symmetry or asymmetry

9. Insects include the largest number of species.

10. Phylum Chordata

Chordates and vertebrates have the same common features: a notochord, a dorsal hollow nerve cord,pharyngeal slits, and a post-anal tail. Vertebrates are further differentiated from chordates by their vertebral column, which forms when their notochord develops into the column of bony vertebrae separated by discs.

Related Questions

Navigate

• Browse (All)
• Browse F
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.