Concept explainers
Plant leaves contain pores called _____ that allow the plant to release ___ and take in __. In hot dry weather, these pores are closed to prevent _____. Photosynthesis occurs in organelles called _______ that are concentrated within the ______ cells of most plant leaves.
To review:
The given blank space in the statement, “plant leaves contain pores called ________ that allow the plant to release ___________ and take in ___________. In hot dry weather, these pores are closed to prevent ________. Photosynthesis occurs in organelles called ____________ that are concentrated within the _________ cells of most plant leaves.”
Introduction:
Plants have various adaptations like small pores in the epidermis or upper layer of leaves known as stomata which help them in the regulation of gas exchange as well as prevention of loss of water. In the leaves of plants, there are specialized organelles known as chloroplasts which perform the process of photosynthesis.
Explanation of Solution
The outer surface of the leaves is covered by a substance known as cuticle which is waxy and does not allow the penetration of water. Instead, water is lost from the leaves from pores in the outer surface (epidermis) called stomata. These stomata close during times of water shortage such as hot weather, to prevent water loss. These stomata allow gaseous exchange by taking in carbon dioxide (CO2) and giving off oxygen (O2).
The process of photosynthesis involves the utilization of sunlight and CO2 to form organic molecules like glucose. To aid this process, plants possess specialized organelles in their leaves called chloroplasts which are made up of a double membrane structure. This double membrane structure contains a matrix known as stroma. Stroma has compartments called thylakoids. Both stroma and thylakoid have important functions in the process of photosynthesis. Most of the chloroplasts are concentrated within mesophyll cells of the leaves.
Plant leaves contain pores called stomata that allow the plant to release oxygen and take in carbon dioxide. In hot dry weather, these pores are closed to prevent water loss (evaporation). Photosynthesis occurs in organelles called chloroplasts that are concentrated within the mesophyll cells of most plant leaves.
Want to see more full solutions like this?
Chapter 7 Solutions
Biology: Life on Earth
- Figure 5.7 On a hot, dry day, plants close their stomata to conserve Water. What impact will this have on photosynthesis?arrow_forwardWhich among the following statements is CORRECT? The thylakoid membrane, in the chlorophyll, contains photosystems which are used to capture photons and excite electrons Electrons excited in photosystem II help the chloroplast produce NADPH Stroma is a gelatinous matrix inside chloroplast that contains ribosomes, DNA, and enzymes Electrons excited in the photosystem I help the chloroplast produce ATParrow_forwardWhat is the major trade-off plants face when they undergo photosynthesis? When they open their stomata to let in oxygen, they can lose water. When they open their stomata to release oxygen, they can lose water. When they open their stomata to let in carbon dioxide, they can lose water. When they open their stomata to let in water, they can lose carbon dioxide.arrow_forward
- If a plant closes its stomata, what can no longer get into the leaf, that cells need to do photosynthesis? glucose water carbon dioxide oxygenarrow_forwardIn a rainforest there are a wide variety of plants. Short plants have broad, flat leaves . Tall plants have small, narrow leaves. What is an advantage of short plants having broad , flat leaves ? to transport nutrients through the plant to prevent water loss from transpiration to obtain energy by breaking bonds in glucose to capture energy used for photosynthesisarrow_forwardWhen chlorophyll absorbs the energy in sunlight, this energy: Activates electrons in chlorophyll Generates heat used by the plant for photosynthesis O Is used to break apart sugararrow_forward
- The image below shows a plant that has one stem wrapped in plastic. You can see the condensation of water on the inside of the plastic bag. Which of the following best explain the processes required for the bag to accrue 1 point condensation? Water from the root to the leaves via the xylem and transpiration from the stomata O Photosynthesis from the leaves via the stomata. O Cellular respiration through the stems. Cellular division within the dermal tissue.arrow_forwardPhotosynthesis generally takes place in which parts of the plant? Steam and leaf Leaf and other chloroplast bearing plants Bark and leaf Roots and chloroplast bearing plantsarrow_forwardWhich of the following statements about the challenges of C3 photosynthesis under hot conditions is TRUE? O When they close stomatal cells, they save water but lose too much O2. O Rubisco has a higher affinity for CO2, making the rate of photosynthesis too rapid. When stomatal cells close, photorespiration increases and CO2 is lost. C3 plants have to spend energy to store carbon in a separate specialized cell.arrow_forward
- If plants need CO2 to construct glucose (by photosynthesis), why is the rising level of CO2 in the atmosphere cause for concern? You’d think more CO2 would accelerate plant growth, and that would be a good thing.arrow_forwardPhotosynthesis occurs in the chloroplasts packed within the mesophyll cells. Summer leaves are green because they contain about 50 times more chlorophyll than carotenoids. But during the fall, carotenoids have their season of glory because chlorophyll breaks down first, revealing the striking orange and yellow colors of carotenoids, which were there all along. The changes that leaves undergo before they fall off allow the plant to reclaim nutrients from the leaves for storage and use the following spring. How do these nutrients leave the leaf ?arrow_forwardJaden grows geraniums in his greenhouse. He has noticed that his flowers are not growing very well. The greenhouse is in the shade for much of the day and maintains a temperature of 23°C (74°F). What might be the problem and how could Jaden do to fix it?arrow_forward
- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax CollegeBiology: The Unity and Diversity of Life (MindTap...BiologyISBN:9781337408332Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa StarrPublisher:Cengage Learning
- Biology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxBiology Today and Tomorrow without Physiology (Mi...BiologyISBN:9781305117396Author:Cecie Starr, Christine Evers, Lisa StarrPublisher:Cengage LearningBiology: The Unity and Diversity of Life (MindTap...BiologyISBN:9781305073951Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa StarrPublisher:Cengage Learning