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Questions and Answers
What is the term for the production of new individuals from the vegetative part of a parent?
What is the term for a flower that may have either male or female reproductive parts?
What is the process known as the transfer of pollen grains from the anther to the stigma of the same or another flower of the same kind?
What is the term for the fusion of male and female gametes?
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How do seeds disperse in plants?
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What are the different methods of asexual reproduction?
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What is the main function of a flower?
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Which mode of asexual reproduction involves the formation of a new individual from a bulb-like projection called a bud?
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What type of reproduction occurs in yeast?
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Which type of vegetative propagation occurs easily in nature and involves simple vegetative parts?
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What is the main difference between self-pollination and cross-pollination?
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Which type of reproduction requires only one parent?
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In which mode of asexual reproduction are the newly developed plants identical to the parent and to each other?
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Which type of reproduction involves the production of seeds and requires two parents?
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What are spores in terms of reproduction?
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What is the main function of the reproductive parts in sexual reproduction?
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Which type of motion is exhibited by the hands while running?
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What type of motion does a child on a see-saw experience?
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In what type of motion is the motion of a child in a merry-go-round classified?
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What type of motion is demonstrated by the hammer of an electric bell?
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What type of motion does a train on a straight bridge exhibit?
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What type of motion is shown by a horse pulling a cart on a straight road?
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What is the basic unit of time?
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Which unit is used to measure the distance between two cities?
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What is the time period of a given pendulum?
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In which units is the speed of a train expressed?
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What is the time period of a pendulum that takes 32 s to complete 20 oscillations?
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What is the speed of a train that takes 4 hours to cover a distance of 240 km?
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What is the distance moved by a car if its odometer reading changes from 57321.0 km to 57336.0 km in 20 minutes?
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What is the distance between Salma's house and her school if she takes 15 minutes to reach her school on a bicycle with a speed of 2 m/s?
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What does the distance-time graph look like for a car moving with a constant speed?
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What does the distance-time graph look like for a car parked on a side road?
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Study Notes
Reproductive Terms and Processes
- Asexual reproduction refers to the production of new individuals from the vegetative part of a parent.
- Flowers with both male (stamens) and female (pistils) reproductive parts are termed perfect or bisexual flowers.
- Pollination is the transfer of pollen grains from the anther to the stigma of the same or another flower of the same species.
- Fertilization is the fusion of male and female gametes, leading to the formation of a zygote.
Seed Dispersal and Asexual Reproduction Methods
- Seeds disperse through various methods including wind, water, animals, and mechanical means.
- Different methods of asexual reproduction include binary fission, budding, fragmentation, vegetative propagation, and spore formation.
- The main function of a flower is reproduction, facilitating the processes of pollination and fertilization.
Types of Asexual Reproduction
- Budding is an asexual reproduction mode involving the formation of a new individual from a bulb-like projection called a bud.
- Yeast typically reproduces through asexual budding.
- Simple vegetative parts that enable easy natural propagation fall under vegetative propagation.
Pollination Differences and Reproduction Types
- Self-pollination occurs when pollen from the same flower fertilizes its own ovules, while cross-pollination involves pollen from one flower fertilizing another flower’s ovules.
- Asexual reproduction requires only one parent, producing genetically identical offspring.
- Clonal propagation results in newly developed plants that are identical to the parent and to each other.
- Sexual reproduction involves the production of seeds and requires two parents.
Spores and Sexual Reproduction
- Spores are reproductive cells capable of developing into a new organism, particularly in fungi and certain plants.
- The main function of reproductive parts in sexual reproduction is the formation of gametes, leading to fertilization.
Motion and Measurement
- The hands exhibit circular motion while running.
- A child on a see-saw experiences oscillatory motion.
- Motion of a child in a merry-go-round is classified as circular motion.
- The hammer of an electric bell demonstrates periodic motion.
- A train on a straight bridge exhibits linear motion.
- A horse pulling a cart on a straight road displays rectilinear motion.
Units of Measurement
- The basic unit of time is the second.
- Distance between two cities is typically measured in kilometers.
- The time period of a given pendulum is defined by its oscillation frequency.
- Speed of a train is generally expressed in kilometers per hour (km/h).
Speed and Distance Calculations
- The time period of a pendulum that takes 32 seconds to complete 20 oscillations can be calculated; it equals 1.6 seconds per oscillation.
- A train traveling 240 km in 4 hours has a speed of 60 km/h.
- If a car's odometer reading changes from 57321.0 km to 57336.0 km in 20 minutes, the distance moved is 15 km.
- If Salma takes 15 minutes at a speed of 2 m/s to reach school, the distance to her school is 1800 meters (1.8 km).
Distance-Time Graphs
- A distance-time graph for a car moving with constant speed is a straight line with a positive slope.
- A distance-time graph for a parked car shows a horizontal line, indicating no change in distance over time.
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Description
Test your understanding of Class 7 Science Chapter 12 'Reproduction in Plants' with exercise solutions. Fill in the blanks, answer questions about flower reproductive parts, and understand the transfer of pollen grains.
