Part E: Case-Based Questions. Case Study 1. Priya kept one plant near a sunny window and another in a completely dark room for a week. The plant in sunlight stayed green and healthy, while the one in darkness turned yellowish and weak with very little growth. Choose the correct option. Which factor necessary for photosynthesis was absent in the dark room?
  • Sunlight
  • Water
  • Carbon dioxide
  • Chlorophyll
Part E: Case-Based Questions. Case Study 1. Priya kept one plant near a sunny window and another in a completely dark room for a week. The plant in sunlight stayed green and healthy, while the one in darkness turned yellowish and weak with very little growth. Choose the correct option. Name the green pigment involved in food preparation in plants.
  • Carotene
  • Xanthophyll
  • Chlorophyll
  • Melanin
What are the tiny pores on the surface of leaves through which transpiration occurs?
  • Lenticels
  • Stomata
  • Villi
  • Nephrons
Part E: Case-Based Questions. Case Study 2. A gardener watered plants regularly but noticed droplets of water on leaf edges early in the morning. Choose the correct option. Which process is related to water loss from leaves?
  • Transpiration
  • Respiration
  • Germination
  • Photosynthesis
Part E: Case-Based Questions. Case Study 2. A gardener watered plants regularly but noticed droplets of water on leaf edges early in the morning. Choose the correct option. Through which structures does this water loss occur mainly?
  • Stomata
  • Veins
  • Cuticle
  • Nodes
Part E: Case-Based Questions. Case Study 2. A gardener watered plants regularly but noticed droplets of water on leaf edges early in the morning. Choose the correct option. Which statement best explains a useful effect of transpiration for plants?
  • It helps pull water upward and cools the leaves
  • It directly increases sugar production without photosynthesis
  • It decreases mineral uptake by roots
  • It causes permanent wilting of plants
What is the main purpose of photosynthesis in plants?
  • To produce oxygen
  • To create food in the form of glucose
  • To absorb water from the soil
  • To release carbon dioxide
In which part of the plant does photosynthesis primarily occur?
  • Roots
  • Stems
  • Leaves
  • Flowers
What are the main products of cellular respiration?
  • Glucose and oxygen
  • Carbon dioxide and water
  • ATP and glucose
  • Carbon dioxide and ATP
During photosynthesis, what gas is taken in by plants?
  • Oxygen
  • Nitrogen
  • Carbon dioxide
  • Hydrogen
What is transpiration in plants?
  • Absorption of water from the soil
  • Release of oxygen into the air
  • Process of taking in carbon dioxide
  • Loss of water vapor from the leaves
What role does chlorophyll play in photosynthesis?
  • It absorbs water
  • It captures sunlight
  • It releases oxygen
  • It produces glucose
Why is transpiration important for plants?
  • It helps in the transport of minerals from the soil
  • It cools the plant down
  • It provides energy for photosynthesis
  • Both A and B
In the tropical rainforest it rains daily, so which of the following would be most likely.
  • The guard cells would close the stomata to conserve water.
  • The guard cells would open the stomata so that transpiration could take place.
  • The turgor pressure would be low because of the lack of water.
During photosynthesis, plants absorb energy from sunlight, they take in water from the soil using their roots, and they take in carbon dioxide from the atmosphere. What is produced in the leaves of plants, in addition to oxygen?
  • sugar
  • hydrogen
  • minerals
  • all of these
Photosynthesis typically occurs in plant cells. Cellular respiration occurs in
  • the cell(s) of all organisms.
  • animal cells only.
  • the cells of multicellular organisms only.
  • plant cells only.
What is the main pigment in plants that captures sunlight for photosynthesis?
  • Carotene
  • Chlorophyll
  • Melanin
  • Anthocyanin
What are the two raw materials (reactants) needed for photosynthesis?
  • Oxygen and glucose
  • Carbon dioxide and water
  • Nitrogen and sunlight
  • Glucose and carbon dioxide
Which part of the plant is primarily responsible for carrying out photosynthesis?
  • Root
  • Stem
  • Leaf
  • Flower
What are the two types of plant transport tissues?
  • Epidermis and cortex
  • Xylem and phloem
  • Stomata and chloroplast
  • Cambium and pith
Which of the following is an example of vegetative (asexual) reproduction in plants?
  • Pollination
  • Seed germination
  • Budding in a potato
  • Fertilization of an egg cell
What gas is released by plants as a product of photosynthesis?
  • Carbon dioxide
  • Nitrogen
  • Hydrogen
  • Oxygen
Which part of a flower contains the pollen grains needed for generative reproduction?
  • Pistil
  • Petal
  • Anther
  • Sepal
The chemical equation for photosynthesis can be written as: . What does represent?
  • Carbon dioxide
  • Water
  • Glucose (sugar)
  • Oxygen
What is the main function of xylem tissue in a plant?
  • To transport sugar from leaves to other parts of the plant
  • To transport water and minerals from roots to leaves
  • To produce new cells for plant growth
  • To store food in the stem
A plant is placed in a dark room for several days. Which of the following outcomes would most likely occur?
  • The plant produces more oxygen than usual
  • The plant grows faster because it saves energy
  • The plant cannot perform photosynthesis and begins to lose energy
  • The plant switches to absorbing nitrogen instead of carbon dioxide
How does vegetative reproduction differ from generative reproduction in plants?
  • Vegetative reproduction requires pollen, while generative reproduction does not
  • Vegetative reproduction produces new plants from non-reproductive parts, while generative reproduction involves seeds formed from fertilization
  • Vegetative reproduction only occurs in trees, while generative reproduction occurs in all plants
  • Vegetative reproduction is slower than generative reproduction
Why do leaves have tiny pores called stomata on their surface?
  • To absorb sunlight more efficiently
  • To allow the exchange of gases such as carbon dioxide and oxygen
  • To store water inside the leaf
  • To attract insects for pollination
A student notices that a plant with yellow leaves grows much slower than a plant with green leaves. Using your knowledge of photosynthesis, explain why this happens.
  • Yellow leaves contain more chlorophyll, making photosynthesis faster
  • Yellow leaves have less chlorophyll, reducing the plant's ability to capture light and produce food
  • Yellow leaves absorb more water, causing the plant to grow slower
  • Yellow leaves release more carbon dioxide, which slows down growth
Which of the following best explains why phloem is important for a plant's survival?
  • It provides structural support to keep the plant upright
  • It distributes glucose produced during photosynthesis to all parts of the plant that need energy
  • It absorbs sunlight and converts it into chemical energy
  • It transports water from the soil to the leaves
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