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 The above pairs of pictures a and b are the examples of G development

The above pairs of pictures a and are the examples of G development in response to environment b heterophylly a. lesser, higher higher, lesser c. higher, higher lesser, lesser Question No. 13 to 16 consist of two statements-a statement of assertion (A) is followed by a statement of reason ( ) Mark the correct choice as:

  1. Both and are true and is the correct explanation of
  2. Both and are true and is not the correct explanation of
  3. is true but is false.
  4. Both and are false.
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Figure 7.7 Muscle tissue : (a) Skeletal (striated) muscle tissue (b) Smooth muscle tissue (c) Cardiac muscle tissue The smooth muscle fibres taper at both ends (fusiform) and do not show striations (Figure 7.7b). Cell junctions hold them together and they are bundled together in a connective tissue sheath. The wall of internal organs such as the blood vessels, stomach and intestine contains this type of muscle tissue. Smooth muscles are 'involuntary' as their functioning cannot be directly controlled. We usually are not able to make it contract merely by thinking about it as we can do with skeletal muscles. Cardiac muscle tissue is a contractile tissue present only in the heart. Cell junctions fuse the plasma membranes of cardiac muscle cells and make them stick together (Figure 7.7c). Communication junctions (intercalated discs) at some fusion points allow the cells to contract as a unit, i.e., when one cell receives a signal to contract, its neighbours are also stimulated to contract. 7.1.4 Neural Tissue Neural tissue exerts the greatest control over the body's responsiveness to changing conditions. Neurons, the unit of neural system are excitable cells (Figure 7.8). The neuroglial cell which constitute the rest of the neural system protect and support neurons. Neuroglia make up more than onehalf the volume of neural tissue in our body. When a neuron is suitably stimulated, an electrical disturbance is generated which swiftly travels along its plasma Figure 7.8 Neural tissue (Neuron neuroglea)
Question 3
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Epithelial tissue Nervous tissue in earthworm neutralises ilciferous glands izzard or of flattened cells with rod vessels and air sacs e forming a diffusion s of tissue is being tar epithelium ind epithelium nective tissue is otein fibres how many of (1) Multitayered epithelium (2) Limited role in secretion and absorption (3) Main function is to provide protection against chemical and mechanical stresses. (4) They cover the dry surface of akin, moist surface of buccal cavify and pharyns (2) Throe (1) Four (4) One (1) Two 22. Pseudostratified eitiated columnar epithelia is observed (1) Respiratory tract (2) PCT (3) Urethra (4) Gastro-intestinal tract 23. Identify the corroct matching A B (1) A-Cartilage, P-Elastic fibres (2) A-Bone, - Osteocyte (3) B - Cartilage, - Chondrocyte (4) - Bonc, - Haversian canal 24. Identify the correct option with respect to the figures (A \& B) given below A B (1) A: Provide protection against chemical and mechanical stresses: Stomach (2) A: Secrete mucus, saliva, earwax, oil, milk, digestive enzymes: Stomach (3) B: Found in ducts of glands: Secretion and absorption (4) B: Mainly present in the inner surface of hollow organs: Secretion and absorption 25. Read the given statements about blood vascular system of cockroach
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  2. It contains no blood vessels except aorta of heart
  3. Heart is six chambered
  4. Haemolymph is composed of colourless plasma and haemocytes
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Question Text
The above pairs of pictures a and are the examples of G development in response to environment b heterophylly a. lesser, higher higher, lesser c. higher, higher lesser, lesser Question No. 13 to 16 consist of two statements-a statement of assertion (A) is followed by a statement of reason ( ) Mark the correct choice as:
Updated OnApr 18, 2023
TopicStructural Organisation in Plants and Animals
SubjectBiology
ClassClass 11
Answer Type Video solution: 1
Upvotes116
Avg. Video Duration4 min