Download App

Structural Organisation in Animals — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYStructural Organisation in Animals3 Marks
Question
Explain in brief the central nervous system of frog.
✓

Answer

Central Nervous System of Frog:
  • Brain is enclosed in a bony structure called brain box or skull (cranium).
  • The brain is divided into fore-brain, mid-brain and hind-brain.
  • Forebrain includes olfactory lobes, paired cerebral hemispheres and unpaired diencephalon.
  • The midbrain is characterised by a pair of optic lobes.
  • Hind-brain consists of cerebellum and medulla oblongata.
  • The medulla oblongata passes out through the foramen magnum and continues into spinal cord, which is enclosed in the vertebral column.
  • There are ten pairs of cranial nerves arising from the brain.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "3 Marks Question" from Structural Organisation in Animals→Structural Organisation in Animals — all question types→BIOLOGY STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Differentiate between the following: Osmotic pressure and osmotic potential
→
Mention the similarities between the:
  1. Cardiac and skeletal muscles.
  2. Cardiac and smooth muscles.
→
Write the detailed form of the following abbreviations. FAD, NADP, RUBISCO, PQ, PGA, PGAL, RUDP, ADP, PC and Fd.
→
Can all the four chambers of the human heart experience systole simultaneously? Explain justifying your answer.
→
Transpiration is a necessary evil in plants. Explain.
→
Metabolism is a defining feature of all living organisms without exception. Isolated metabolic reactions in vitro are not living things but surely living reactions. Comment.
→
What are the main criteria used for five kingdom system of classification?
→
Write the appropriate type of tissues in Column B according to the functions mentioned in Column A.
  1. Secretion and absorption __________.
  2. Protective covering ____________.
  3. Linking and supporting framework ____________.
→
Nutan's grandfather read in the newspaper that, for predicting the identity of criminals or for deciding the controversies regarding biological parents of the child, court always asks for DNA test. He wanted to know the procedure behind it. So, asked Nutan about DNA as she was studying biology in class XI. She replied that it is a substance present in the cells of living organisms which store the information about an individual.
  1. According to you, what is DNA? And what percentage of DNA varies from one individual to the other?
  2. What are the main constituents of DNA?
  3. Why are biologists interested in studying human genome?
  4. What values are reflected from Nutan's grandfather behaviour?
→
Xylem transports water from roots to stems and leaves. This is similar to which of the following? Give reasons for your answer. Explain the problems which have cropped up because of overexploitation of water?
  1. Water being pumped from under the ground to overhead water tank.
  2. Water being supplied to different faucets in the house.
→