9th Class Biology – Short Questions & Answers
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What is standard deviation?
Standard deviation is a measure of the spread or variability of a set of data points. A high standard deviation indicates that data points are spread out widely from the mean.
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What is a seed?
A seed is a fertilized ovule that contains an embryo, a food reserve, and a protective coat.
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What is a hypothesis in biostatistics?
A hypothesis is a statement or assumption that can be tested through research and statistical analysis. It typically addresses a relationship between two or more variables.
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What is the role of the ovary in plant reproduction?
The ovary houses the ovules (female gametes). After fertilization, the ovary develops into a fruit, and the ovules become seeds.
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What is a confidence interval?
A confidence interval is a range of values, derived from sample data, that is likely to contain the true population parameter with a certain level of confidence.
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What is vegetative propagation?
Vegetative propagation is a form of asexual reproduction in plants where new plants grow from parts of the parent plant, such as stems, roots, or leaves.
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What is p-value in hypothesis testing?
The p-value is the probability of obtaining results at least as extreme as the observed results, assuming the null hypothesis is true. A p-value less than 0.05 usually indicates statistical significance.
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What are the advantages of asexual reproduction in plants?
Asexual reproduction allows rapid reproduction of genetically identical offspring, which can be advantageous in stable environments.
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What is correlation?
Correlation is a statistical measure that describes the strength and direction of a relationship between two variables.
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What is the significance of cross-pollination?
Cross-pollination promotes genetic diversity by combining the genetic material from different plants, leading to stronger offspring with varied traits.
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