Popular Questions
- A child questioned his teacher that why do organisms resemble their parents more as compared to grandparents.
- (i) In humans, if gene B gives brown eyes (ii) What do you class this trait of eye colour in human? Explain.
- In a pea plant, find the contrasting trait if
- In a monohybrid cross, pink coloured flowers are dominant over white coloured flowers.
- Study the following cross and showing self-pollination in F1, fill in the blank and answer the questions that follows.
- Does genetic combination of mothers play a significant role in determining the sex of a newborn?
- Can sexual reproduction lead to the variations in characters, speciation and evolution? Explain
- In pea plant, round seed is dominant over the wrinkled.
- Distinguish between acquired and inherited characters with an example of each.
- (i) If, we cut the tail of a mouse, will tail occur in the next generation of that mouse (ii) What are the features that Archaeopt..
- (i) Males are heterogametic. Why (ii) Differentiate between inherited and acquired characters by giving two points.
- Traits that are acquired during lifetime do not result in evolution. Why?
- What is speciation? List four factors that could lead to speciation.
- (i) What would happen if two groups of organisms of a single species never exchange genes? (ii) In which way can the study of dive..
- The two areas of study namely evolution and Classification are interlinked. Justify the statement.
- A scientist is conducting embryological studies for collecting evidence supporting evolution.
- (i) Give the evidence that the birds have evolved from reptiles. (ii) Insects, Octopus, Planaria and vertebrates possess eyes.
- What are homologous structures? Give an example.
- Mention three important features of fossils which help in the study of evolution.
- All the human races like africans, Asians, Europeans, Americans and other might have evolved from a common ancestor. Provide a few..
- How and why did human race spread from africa to other parts of the world?
- A trait may be inherited, but may not be expressed. Justify this statement with the help of a suitable example.
- Give reason for your choice. A person first crossed pure-bread pea plants having round-yellow seeds with pure-bread
- Kalawati often blames her daughter-in-law for having only daughters and no son.
- (i) What is geographical isolation. (ii) Illustrate formation of a species with the help of an example
- Define evolution. How does it occur? Describe,
- Name any five vegetables generated from a common ancestor through artificial selection rather than natural selection.
- X, Y and Z are three animals. The animal x can fly, but animal y can only run on ground or walls
- Does geographical isolation of individuals of a species lead to formation of a new species? Provide a suitable explanation.
- Evolution has exhibited a greater stability of molecular structure when compared with morphological structures.
- Bacteria have a simpler body plan when compared with human beings.
- Why is it more appropriate to compare the process of evolution with branches of a tree rather than with a ladder?
- Explain the original idea of tracing evolutionary relationships.
- (i) Identify the fossils A, B and C (ii) In which region was fossil C found? (iii) In which region are recent fossils found?
- Evolution is a/an
- An inherited character which is normally inherited and has detectable variant is
- The law of dominance states that
- Which Mendelian law states that inheritance of one character is always independent to the inheritance of other character within th..
- Fossils are helpful in
- Assertion : The ratio of plants when Mendel took pea plants Reason : The ratio of plants when Mendel took pea plant with one cont..
