11. What is the process by which green plants make their own food?
Photosynthesis
22. What are the raw materials needed for photosynthesis?
Carbon dioxide, water, and sunlight
33. Which pigment is responsible for the green color in plants?
Chlorophyll
44. Where in the plant does photosynthesis primarily occur?
In the leaves
55. What are the tiny pores on the surface of leaves called?
Stomata
66. What gas do plants take in during photosynthesis?
Carbon dioxide
77. What gas do plants release during photosynthesis?
Oxygen
88. What is the main product of photosynthesis that is used as food by the plant?
Glucose
99. What are the structures inside plant cells where photosynthesis occurs?
Chloroplasts
1010. How do plants transport water from the roots to the leaves?
Through the xylem
1111. What is the term for organisms that can make their own food?
Autotrophs
1212. What are the organisms called that depend on other organisms for their food?
Heterotrophs
1313. Give an example of a heterotrophic organism.
Animals
1414. What is the symbiotic relationship between fungi and algae called?
Lichen
1515. What do you call the plants that obtain nutrients by trapping and digesting insects?
Insectivorous plants
1616. Give an example of an insectivorous plant.
Venus Flytrap
1717. What type of nutrition involves the intake of solid food?
Holozoic nutrition
1818. Which part of the plant cell stores starch grains?
Amyloplasts
1919. What is the byproduct of photosynthesis that is essential for human and animal life?
Oxygen
2020. What are the tiny hair-like structures on roots that help in the absorption of water?
Root hairs
211. Explain the process of photosynthesis.
Plants use sunlight, carbon dioxide, and water to produce glucose and oxygen. This occurs in the chloroplasts where chlorophyll captures light energy.
222. Describe the role of chlorophyll in photosynthesis.
Chlorophyll absorbs light energy, primarily blue and red wavelengths, and converts it into chemical energy for synthesizing glucose from CO₂ and water.
233. How do stomata function in the process of photosynthesis?
Stomata are tiny pores that allow carbon dioxide to enter the leaf and oxygen to exit. They also regulate water loss through opening and closing.
244. What is the importance of photosynthesis in the ecosystem?
Photosynthesis provides energy for plants and all organisms that consume plants. It produces oxygen essential for respiration and maintains the balance of gases in the atmosphere.
255. How do insectivorous plants obtain their nutrients, and why do they need to trap insects?
Insectivorous plants trap and digest insects to obtain nutrients, especially nitrogen, which are scarce in their native nutrient-poor soils.
266. What is the chemical equation for photosynthesis?
The chemical equation for photosynthesis is 6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂.
277. How do plants transport water and nutrients from the roots to other parts?
Plants transport water and nutrients through the xylem, which carries them from the roots to the leaves.
288. Explain the role of guard cells in the functioning of stomata.
Guard cells control the opening and closing of stomata, regulating gas exchange and water loss in response to environmental conditions.
299. What is the significance of glucose produced during photosynthesis?
Glucose is used as an energy source by plants and as a building block for growing. It is also vital for other organisms that consume plants.
3010. Describe the relationship between photosynthesis and cellular respiration.
Photosynthesis produces glucose and oxygen, which are used in cellular respiration to generate energy, water, and carbon dioxide, completing the cycle.
3111. How does light intensity affect the rate of photosynthesis?
Higher light intensity increases the rate of photosynthesis up to a point, after which other factors become limiting.
3212. What adaptations do plants have to perform photosynthesis efficiently?
Plants have broad leaves to maximize light absorption, chlorophyll to capture light energy, and a network of veins to transport water and nutrients.
3313. How do carnivorous plants like the Venus Flytrap digest insects?
Carnivorous plants secrete digestive enzymes to break down the prey into absorbable nutrients, which supplement their diet in nutrient-poor soils.
3414. What are the byproducts of photosynthesis and why are they important?
The byproducts of photosynthesis are oxygen, essential for the respiration of most living organisms, and glucose, which provides energy.
3515. Explain the term 'autotroph' and give an example.
Autotrophs are organisms that produce their own food through photosynthesis or chemosynthesis. Example: Green plants.
3616. What is the importance of stomata in maintaining plant health?
Stomata regulate gas exchange and water loss, crucial for photosynthesis and transpiration, helping maintain plant health and hydration.
3717. How do different colors of light affect photosynthesis?
Blue and red light are most effective for photosynthesis as they are best absorbed by chlorophyll, while green light is least effective.
3818. What is the role of water in photosynthesis?
Water provides electrons and hydrogen ions needed for the synthesis of glucose and oxygen is released as a byproduct.
3919. How do environmental factors like temperature and CO₂ concentration affect photosynthesis?
Optimal temperature and increased CO₂ concentration can enhance the rate of photosynthesis, but extreme conditions can inhibit it.
4020. Why is photosynthesis considered an endothermic reaction?
Photosynthesis is endothermic because it absorbs light energy to convert carbon dioxide and water into glucose and oxygen.
411. What are the three layers of Earth?
Crust, mantle, and core.
422. What is the top layer of the Earth called?
The crust.
433. How thick is the Earth's crust on land?
35 km.
444. How thick is the Earth's crust under the ocean?
5 km.
455. What are the main minerals in the continental crust?
Silica and alumina, called sial.
466. What are the main minerals in the oceanic crust?
Silica and magnesium, called sima.
477. What is the layer just below the crust?
The mantle.
488. How thick is the mantle?
2,900 km.
499. What is the innermost layer of the Earth called?
The core.
5010. What minerals make up the Earth's core?
Nickel and iron, called nife.
5111. What is the Earth's crust made of?
Different types of rocks.
5212. What are the three major types of rocks?
Igneous rocks, sedimentary rocks, and metamorphic rocks.
5313. How are igneous rocks formed?
When molten magma cools and hardens.
5414. What are the two types of igneous rocks?
Extrusive igneous rocks and intrusive igneous rocks.
5515. How are sedimentary rocks formed?
From sediments that are compressed and hardened.
5616. How are metamorphic rocks formed?
When igneous or sedimentary rocks are changed by heat and pressure.
5717. What is the rock cycle?
The process where rocks change from one type to another.
5818. What are minerals?
Naturally occurring substances with specific physical properties and chemical composition.