Tag: characteristics of platyhelminthes and aschelminthes

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Multiple choice biology diversity in living world characteristics of annelida and arthropoda characteristics of platyhelminthes and aschelminthes basis of classification in animals

Match each item in Column I with appropriate one/s in Column II

Column I Column II
A Edward Jenner I Heredity
B Chromosomes II Budding
C Hydra III Protein biosynthesis
IV Smallpox vaccine
V Cell membrane
VI Binary Fission
VII Antibiotics

Select the correct alternative:-

  1. A-VII, B-I, C-II

  2. A-IV, B-I, C-II

  3. A-VII, B-V, C-VI

  4. A-IV, B-II, C-VI
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • The English scientist Edward Jenner (1749 - 1823), regarded as the "Father of Immunology", first introduced the "Smallpox vaccine" in 1796. In fact, the Smallpox vaccine was the first successful vaccine to be invented. Smallpox is a serious contagious disease, caused by the Variola virus. The infected people can have a high fever, body ache, vomiting, and distinctive skin rashes. The smallpox vaccine comprises of live "Vaccinia virus", which quite similar to the Smallpox virus. Jenner's invention eventually led to worldwide immunization by the Smallpox vaccine and eradication of the infectious disease. 
  • Heredity refers to the passing of genetic information from parents to their offspring. Genes are the basic structural and functional units of heredity. In eukaryotic organisms, the Genes remain packaged into large nuclear components, called the Chromosomes. Therefore, each Chromosome comprises many genes. That is why the chromosome is regarded as the "carrier of heredity".   
  • The Coelenterate animal Hydra can reproduce either asexually or sexually. Sexual reproduction in Hydra takes place through the formation of gametes. Asexual reproduction in Hydra is usually seen in the month of summer, especially when the animal is healthy and well-fed. Hydra reproduces asexually by means of Budding. Repeated multiplication of its body-wall cells, results in a bulging appearance near the middle, or the basal part of its body. This bulge grows as a Bud. The wall of the Bud is like an extension of the epidermis and gastrodermis the parent Hydra, while the lumen of the Bud is in continuation with the parent's gastrovascular cavity. A fully grown up Bud finally detaches from the parent's body and gradually develops into an adult Hydra.
Multiple choice biology diversity in living world characteristics of annelida and arthropoda characteristics of platyhelminthes and aschelminthes basis of classification in animals

If a starfish is cut into pieces, each piece grow into a complete animal. The process is called-

  1. Regeneration

  2. Reproduction

  3. Healing of wounds

  4. Growth
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The Starfish or Sea Stars (viz. Asterias, Linckia, Asterina, etc.) are free-living marine Echinoderm animals. They are found in sandy or muddy sea bottoms, or over the rocks, and shells. Some species of Sea Stars have a great power of Regeneration. By this method, they can re-grow an amputated limb or some other body parts. When any arm of a Starfish gets injured, the animal casts off its own arm - a process called Autotomy. Then by the process of Regeneration, the Starfish can re-grow a completely new perfect arm in the place of the injured one. Even, in some Sea Star (viz. Linckia), an arm can even regenerate a complete animal.
Multiple choice biology diversity in living world characteristics of annelida and arthropoda characteristics of platyhelminthes and aschelminthes basis of classification in animals

This organism (animal) is considered as a living fossil as well as a link between annelids and arthropods

  1. Peripatus

  2. Tapeworm

  3. Earthworm

  4. Pheretima
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Peripatus is sometimes considered a living fossil because it and other onychophorans are transitional between Arthropoda and Annelida and retain a large. So, the correct option is "A" (Peripatus).

Multiple choice biology diversity in living world characteristics of annelida and arthropoda characteristics of platyhelminthes and aschelminthes basis of classification in animals

Phylum annelida resembles mollusca in embryonic features because both have __________________.

  1. Spiral cleavage and mesoderm formation

  2. Identical conspicuous segmentation in body, muscles

    and nervous system

  3. Meroblastic cleavage and ectoderm formation

  4. Special type of mouth parts
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Annelids and mollusks are both protostomes, meaning they share developmental characteristics such as spiral cleavage and the formation of the mesoderm from specific blastomeres.

Multiple choice biology diversity in living world characteristics of annelida and arthropoda characteristics of platyhelminthes and aschelminthes basis of classification in animals

A useful insect which no longer occurs in wild is________________.

  1. Laccifera indica

  2. Drosophila melanogaster

  3. Musca nebulo

  4. Bombyx mori
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Bombyx mori, the silkworm, has been domesticated for thousands of years for silk production and is no longer found in the wild.

Multiple choice biology diversity in living world characteristics of annelida and arthropoda characteristics of platyhelminthes and aschelminthes basis of classification in animals

The nephridia which are found in a region of intestine are?

  1. Integumentary nephridia

  2. Pharyngeal nephridia

  3. Septal nephridia
  4. Both $(1)$ & $(3)$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In earthworms, integumentary nephridia are scattered throughout the body wall, including the region of the intestine, to perform excretory functions.