Distinguish between human sperm and ovum.
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Solution and Explanation
The key differences between human sperm and ovum are as follows:
Top Questions on Reproduction in Organisms
- Identify A, B, C, and D in the table given below:
- CBSE CLASS XII - 2024
- Biology
- Reproduction in Organisms
- Identify A, B, C, D, E, and F in the table given below:
- CBSE CLASS XII - 2024
- Biology
- Reproduction in Organisms
- (A) (i) Name three techniques/devices used by human females to avoid pregnancy. Mention the side effects caused by each.
(ii) What will happen if in a human female (a) fertilisation takes place, (b) an egg is not fertilised?OR
(B) (i) Draw a diagram showing spore formation in Rhizopus and label the (a) reproductive and (b) non-reproductive parts. Why does Rhizopus not multiply on a dry slice of bread?
(ii) Name and explain the process by which reproduction takes place in Hydra.- CBSE Class X - 2024
- Science
- Reproduction in Organisms
- Given below is a list of some commercially important products in column A, whereas in column B are names of source organisms:
\[ \begin{array}{|l|l|} \hline \textbf{Column A (Bioactive Products)} & \textbf{Column B (Source Organisms)} \\ \hline A. \text{Cyclosporin – A} & i. \text{Streptococcus} \\ B. \text{Statins} & ii. \text{Trichoderma polysporum} \\ C. \text{Streptokinase} & iii. \text{Penicillium notatum} \\ D. \text{Penicillin} & iv. \text{Monascus purpureus} \\ \hline \end{array} \]
Select the option where the product and their source organisms are correctly matched.
- CBSE CLASS XII - 2024
- Biology
- Reproduction in Organisms
- How do the following organisms act as bio-fertilizers? Explain.
(a) Mycorrhiza
(b) Anabaena
(c) Rhizobium- CBSE CLASS XII - 2024
- Biology
- Reproduction in Organisms
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Derive an expression for energy stored in a charged capacitor. A spherical metal ball of radius 15 cm carries a charge of 2μC. Calculate the electric field at a distance of 20 cm from the center of the sphere.
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- MH Board Class XII - 2024
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An alternating voltage is given by \( e = 8 \sin(628.4 t) \).
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(ii) Frequency of e.m.f.
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