- 39.1: The hormone that helps plants respond to drought is a. auxin. b. ab...
- 39.2: Auxin enhances cell elongation in all of these ways except a. incre...
- 39.3: Charles and Francis Darwin discovered that a. auxin is responsible ...
- 39.4: How may a plant respond to severe heat stress? a. by reorienting le...
- 39.5: The signaling molecule for flowering might be released earlier than...
- 39.6: If a long-day plant has a critical night length of 9 hours, which 2...
- 39.7: A plant mutant that shows normal gravitropic bending but does not s...
- 39.8: Indicate the response to each condition by drawing a straight seedl...
- 39.9: In general, light-sensitive germination is more pronounced in small...
- 39.10: A plant biologist observed a peculiar pattern when a tropical shrub...
- 39.11: Describe how our knowledge about the control systems of plants is b...
- 39.12: In a short essay (100150 words), summarize phytochromes role in alt...
- 39.13: This mule deer is grazing on the shoot tips of a shrub. Describe ho...
Solutions for Chapter 39: Plant Responses to Internal and External Signals
Full solutions for Campbell Biology | 10th Edition
Barred spiral galaxy
A galaxy having straight arms extending from its nucleus.
A sedimentary rock composed of angular fragments that were lithified.
The transfer of heat by the movement of a mass or substance. It can take place only in fluids.
Cosmological red shift
Changes in the spectra of galaxies that indicate they are moving away from the Milky Way as the result of the expansion of space.
The formation and growth of a crystalline solid from a liquid or gas.
A roughly circular upfolded structure similar to an anticline.
The apparent change in wavelength of radiation caused by the relative motions of the source and the observer.
A hill or ridge of wind-deposited sand.
A type of movement common to mass-wasting processes that refers to the free falling of detached individual pieces of any size.
A term used to describe the texture of certain igneous rocks, such as obsidian, that contain no crystals.
Law of conservation of angular momentum
The product of the velocity of an object around a center of rotation (axis), and the distance squared of the object from the axis is constant.
A phenomenon, sometimes associated with earthquakes, in which soils and other unconsolidated materials containing abundant water are turned into a fluid-like mass that is not capable of supporting buildings.
The process of generating more than one rock type from a single magma.
The mass of water vapor in a unit mass of dry air; commonly expressed as grams of water vapor per kilogram of dry air.
The source of the Sun’s energy.
The record made by a seismograph.
A layer in the atmosphere of limited depth where the temperature increases rather than decreases with height.
By international agreement, a tropical cyclone with maximum winds that do not exceed 61 kilometers (38 miles) per hour.
Ultimate base level
Sea level; the lowest level to which stream erosion could lower the land.