Tag: grades of body organisation

Quizzes (2) Questions (3)

Questions Related to grades of body organisation

Multiple choice zoology grades of body organisation characteristics of annelida and arthropoda characteristics of platyhelminthes and aschelminthes basis of classification in animals basis of the classification of animals criteria for animal classification

Cleidoic egg is found in

  1. Birds

  2. Reptiles

  3. Insects

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cleidoic eggs have a protective shell, and are laid out of water. The shell is porous to air, and may be flexible or calcareous (hard). The eggs contain all the food the embryo needs to develop into a hatchling. The significance of the cleidoic egg is that it enables reproduction out of, and often away from, water. It is a characteristic of birds and reptiles. Hence, option D is correct.

Multiple choice zoology grades of body organisation characteristics of annelida and arthropoda characteristics of platyhelminthes and aschelminthes basis of classification in animals basis of the classification of animals criteria for animal classification

The presence of gill slits, in the embryos of all vertebrates support the theory of?

  1. Metamorphosis

  2. Biogenesis

  3. Organic evolution

  4. Recapitulation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Metamorphosis is a biological processes by which an animal physically develops after birth or hatching, involving a conspicuous and relatively abrupt change in the animal's body structure through cell growth and differentiation. Metamorphosis is iodothyronine-induced and an ancestral feature of all chordates. For e.g. presence of gill slit in the embryos explains the origin of respiratory systems in all vertebrates.
So the correct answer is 'Metamorphosis'.
Multiple choice zoology grades of body organisation characteristics of annelida and arthropoda characteristics of platyhelminthes and aschelminthes basis of classification in animals basis of the classification of animals criteria for animal classification

The evolution of this structure lead to the human lineage.

  1. Bone

  2. Cranium

  3. Jaws

  4. Notochord

  5. Vertebrae
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The notochord is the defining structure forming in all chordate embryos. In humans beings, the notochord is formed in the third week and eventually replaced by the vertebral column.