Write one function each of mitochondria and centrosome.

Write two differences between axon and dendron.

What is the function of the ribosome?

On the basis of the relationship in the first related pair of words, write a suitable word in the gap of the second pair: Mitosis : Equational division :: ____ : Reduction division

____ cell division maintains the number of chromosomes constant in a species.

Which of the following is correct regarding the Chemical Composition of nucleotide? (a) 5 - C Sugar + Phosphoric Acid = Nucleotide (b) Nitrogenous base + Phosphoric Acid = Nucleotide (c) 5 - C Sugar + Nitrogenous base = Nucleotide (d) 5 - C Sugar + Nitrogenous base + Phosphoric Acid = Nucleotide

Cornea, Choroid, Lens, Aqueous humour, Iris, Vitreous humour — how many of these are refractory media of the eyeball? (a) 3 (b) 4 (c) 5 (d) 6

Which of the following is not a structural feature of an Axon? (a) Node of Ranvier (b) Myelin sheath (c) Nissl granule (d) Schwann cell

Write the functions of each of the following parts of a neurone : (a) Dendron (b) Axon (c) Myelin Sheath (d) Schwann Cell (e) Node of Ranvier OR Write the functions of the following structural parts of a eukaryotic chromosome: (a) Centromere (b) Nucleolar Organizer (c) Chromatid (d) Telomere (e) Kinetochore

Draw a scientific diagram of a neurone and label the following parts — Axon Node of Ranvier Dendron Schwann Cell OR Draw a scientific diagram of the morphological structure of a eukaryotic chromosome and label the following parts — Chromatid Telomere Centromere Nucleolar Organizer

Explain the following three significances of cell division- Growth Repair Reproduction Tabulate the site of occurrences of meiotic cell division in the living world. [3+2=5] OR Explain the process of micropropagation. Distinguish between asexual and sexual reproduction on the basis of the following three features - No. of Parental organisms Cell Division Origin of variation [2+3=5]

Write one function of each of the following five parts of the human eyeball: [1 × 5 = 5] (a) Cornea (b) Lens (c) Choroid (d) Vitreous humour (e) Retina OR Mention three changes occurring during the Anaphase stage of mitosis in an animal cell. Write the names of any two structural parts of the eukaryotic chromosome. [ 3 + 2 = 5]