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Plant and Human Growth
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Plant and Human Growth
Plant and Human Growth
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Question
What is germination in plants?
Answer
Germination is the process that occurs when a seed begins to develop into a new plant.
Question
What are the first two parts a seed develops during germination, and which direction do they grow?
Answer
The seed first develops a root called the radicle, which grows downward, and then a shoot called the plumule emerges, growing upward through the soil.
Question
What conditions are necessary for a germinated seed to develop into a plant?
Answer
A germinated seed needs energy, oxygen, warmth, and water to develop into a plant.
Question
What is a seedling and how does its growth vary?
Answer
A seedling is a plant that has germinated and started to grow. Seedlings can grow at different rates, and their growth can be measured.
Question
Define an annual plant and give two examples.
Answer
An annual plant is one that completes its life cycle, from germination to the production of seeds, within one growing season, and then dies. Examples include beans and maize (corn).
Question
How is growth in humans similar to growth in plants?
Answer
Both humans and plants have life cycles that include stages of development and growth.
Question
What do growth charts show in humans?
Answer
Growth charts show graphs of height plotted against age for females and males, as well as similar charts of mass against age.
Question
What causes population growth?
Answer
Population growth occurs when the birth rate is higher than the death rate.
Question
List some reasons why the rate of human population growth has increased in recent years.
Answer
Reasons include better pre and postnatal care increasing baby survival, improved healthcare leading to longer life, prevention and treatment of diseases via vaccination and drugs, and huge improvements in sanitation, clean water supplies, nutrition, agriculture, and education.
Question
What are some effects of rapid population growth on quality of life?
Answer
Rapid population growth can lead to food and land shortages, shortages of building materials, overcrowding, unemployment, poverty, problems with water and sanitation, rising population, and increased spread of diseases.
Question
What strategies do countries use to reduce overpopulation?
Answer
Countries try to reduce overpopulation by educating their citizens about family planning and birth control.
Question
Why is teenage pregnancy risky, and what social issues can it cause?
Answer
Teenage pregnancy risks the physical health of girls because their bodies are still maturing. Socially, it can cause girls to drop out of school early, often accompanied by other social problems.