Question

ABTA MADHYAMIK TEST PAPERS 2018-19
235
- (a) Lens (b) Optic Ner
Neurone and lebel follow
of Ranvier (d) End bru
(b) Optic Nerve (c) Sclera (d) Retina. OR, Draw a diagram of
and lebel following parts - (a) Neurocyton (b) Myelin sheath (c) Node
er (d) End brush. 4.2. Write two differences between cytokinesis of
animal cells. Write the features of 'S' phase and 'G, phase in a cell
· OR, What do you mean by the term. 'Cutting' and 'Grafting' in artificial
five reproduction. Write the types of chromosomes on basis of position
entromere on it. 4.3. "Selection of Pea plant for Mendelian experiments
ustified - site three reasons behind it. What do you mean by phenotype
and Genotype ratio? OR, Explain the result of Mendelian dihybird cross upto
F generation with checker's board and write it's phenotype ratio. Thalassamia
is a heriditary disease - explain in brief. 4.4. Mention the sequence of origin
of life as propose by oparin and Haldane. Write the adaptive significance of
pneumatophores. OR, Write the significance of air-sac in the adaptation of
pigeon. Fossils are important proof of organic evolution - explain this with
proper example. 4.5. Discuss briefly the role of symbiotic bacteria in nitrogen
fixation. Mention the problems found in human body due to air pollution and
was justif
noise nollution
to be
14
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Answer 1

Answer:

4.2 Cytokinesis in animals is furrow type. In plants it is cell plate type. Animal cytokinesis is centripetal plant cytokinesis is centrifugal