BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Chapter 27, Problem 12SA
Summary Introduction
Introduction:
The plants respond to various stimuli that can modify the physiological process such as flowering, root formation, and shoot elongation. Light, gravity, heat, and touch are examples of stimulus.
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Stems and roots, respectively, exhibit
a. a positive phototropic response and no phototropic response.
b. a negative phototropic response and no phototropic response.
c. no phototropic response and a positive phototropic response.
d. no phototropic response and a negative phototropic response.
Stomata (a) help prevent desiccation of plant tissues (b) transport water and minerals through plant tissues (c) allow gas exchange for photosynthesis (d) strengthen cell walls (e) produce male gametes
Phytochrome is a plant pigment protein that: a. mediates plant infection b. promotes plant growth c. mediates morphological changes in response to red and far-red light d. inhibits plant growth
Chapter 27 Solutions
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Ch. 27 - An animal pollinator may be rewarded by _______...Ch. 27 - The arrival of pollen grains on a receptive stigma...Ch. 27 - Prob. 3SACh. 27 - In flowers, the structures that produce male...Ch. 27 - Seeds are mature _______ ; fruits are...Ch. 27 - Prob. 6SACh. 27 - The three main parts of a typical mature eudicot...Ch. 27 - Prob. 8SACh. 27 - Prob. 9SACh. 27 - Prob. 10SA
Ch. 27 - Prob. 11SACh. 27 - Prob. 12SACh. 27 - Prob. 13SACh. 27 - Which of the following statements is false? a....Ch. 27 - Match the observation with the main hormones.. ___...Ch. 27 - The oat coleoptiles on the left have been...Ch. 27 - Is the seedling shown on the right a monocot or...Ch. 27 - Prob. 3CTCh. 27 - Prob. 4CT
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- Why do desert plants that live in very hot and dry conditions have stomata? a. To allow for transpiration b. To allow for gas exchange c. To allow for the release of excess heat d. Both a and b are correct.arrow_forwardA plant lacking the WOODEN LEG gene will likely a. be incapable of transporting water to its leaves. b. lack xylem and phloem. c. be incapable of transporting photosynthate. d. All of the choices are correct.arrow_forwardA difference between monocot and dicot plant stems is thea. absence of buds in monocots.b. organization of vascular tissue.c. presence of guard cells.d. absence of stomata.arrow_forward
- Which cells are responsible for the movement of photosynthates through a plant? a. tracheids, vessel elements b. tracheids, companion cells c. vessel elements, companion cells d. sieve-tube elements, companion cellsarrow_forwardWhich of the following is the role of iron in plants? A. endosperm development and dehydrogenase activity B. photodestruction of chlorophyll and chloroplast structure C. energy transferring process for photosynthesis and respiration D. regulatory component of proteins and metabolites in roots and leavesarrow_forwardWhich of the following statements is/are FALSE for CAM plants? a.The dark reaction uses less ATP and NADPH than other plants. b.Succulents and tropical plants growing under semi-arid condition. c.C4 pathway occurs at night and C3 pathway occurs at daytime. d.Scotoactive stomata are open during daytime but close at nighttime.arrow_forward
- Which of the following is false about the phytochrome protein?a. There are two convertible forms.b. It primarly absorbes blue wavelengths of light.c. It is involved in seed germination.d. It is involved in plant sensing of spacing.arrow_forwardChoose correct option and explain. A plant wilts when- a) sunlight is not available and the rate of photosynthesis slows down. b) the mycorrhizae among its roots have "stolen" too much water from the plant. c) it is sad. d) turgor pressure in cells' central vacuoles is high. e) turgor pressure in cells' central vacuoles is lowarrow_forwardWhat will likely happen to your plant if it will be placed in a dark area with no light? A.The plant will not be able to absorb sunlight B.No chlorophyll will be formed and the leaves will become whitish or pale yellow C.Plants will evolve to adapt in an environment with no light D.BothA and B E. BothA and Carrow_forward
- Root cells exhibit positive gravitropism with the help ofa. auxin in the root cells.b. amyloplasts in root cells.c. exposure to sunlight.d. a nearby substrate.arrow_forwardTo which of the two lighting conditions would you expose seedlings if you wanted to maximize the rate of photosynthesis in the plants as well as minimizing your costs for electricity to light the plants in the greenhouse? A. Low light only. B. Moderate light only. C. Low light for the first 12 hours and then moderate light afterwards. D. Moderate light for the first 12 hours and then low light afterwards.arrow_forwardFlower shape and color can be linked to the process ofa. pollination.b. photosynthesis.c. germination.d. secondary growtharrow_forward
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