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Chapter Questions
During which step of signal transduction is a second messenger released into the cytoplasm?$$\begin{array}{ll}{\text { a. reception }} & {\text { c. transduction }} \\ {\text { b. response }} & {\text { d. final step }}\end{array}$$
For questions $2-8,$ match each statement with a hormone in the key. Answers can be used more than once.KEY:a. auxinb. gibberellinc. cytokinind. ethylenee. abscisic acidIt is present in a gaseous form
For questions $2-8,$ match each statement with a hormone in the key. Answers can be used more than once.KEY:a. auxinb. gibberellinc. cytokinind. ethylenee. abscisic acidGrapes can grow larger and exhibit stem elongation
For questions $2-8,$ match each statement with a hormone in the key. Answers can be used more than once.KEY:a. auxinb. gibberellinc. cytokinind. ethylenee. abscisic acidStomata close when a plant is water-stressed.
For questions $2-8,$ match each statement with a hormone in the key. Answers can be used more than once.KEY:a. auxinb. gibberellinc. cytokinind. ethylenee. abscisic acidStems bend toward the sun.
For questions $2-8,$ match each statement with a hormone in the key. Answers can be used more than once.KEY:a. auxinb. gibberellinc. cytokinind. ethylenee. abscisic acidIt inhibits plant senescence
For questions $2-8,$ match each statement with a hormone in the key. Answers can be used more than once.KEY:a. auxinb. gibberellinc. cytokinind. ethylenee. abscisic acidIt causes leaf abscission.
For questions $2-8,$ match each statement with a hormone in the key. Answers can be used more than once.KEY:a. auxinb. gibberellinc. cytokinind. ethylenee. abscisic acidIt is responsible for apical dominance
Primary metabolites are needed for ______, while secondary metabolites are produced for ______.a. growth, signal transductionb. normal cell functioning, defensec. defense, growthd. signal transduction, normal cell functioning
The sensors in the cells of the root cap are calleda. mitochondria.b. central vacuoles.c. statoliths.d. chloroplasts.e. intermediate filaments.
A student places 25 corn seeds in a large pot and allows the seeds to germinate in total darkness. Which of the following growth or movement activities would the seedlings exhibit?a. gravitropism, as the roots grow down and the shoots grow upb. phototropism, as the shoots search for lightc. thigmotropism, as seedlings move toward the edge of the potd. All of these are possible.
The snapping of a Venus flytrap is an example of aa. phototropism.b. gravitropism.c. circadian rhythm.d. turgor movement.e. thigmotropism.
A plant requiring a dark period of at least 14 hours willa. flower if a 14-hour night is interrupted by a flash of light.b. not flower if a 14-hour night is interrupted by a flash of light.c. not flower if the days are 14 hours long.d. not flower if the nights are longer than 14 hours.e. Both b and c are correct.
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.
A morning glory flower opens during the day and closes at night. This response is due to itsa. phototropism.b. circadian rhythm.c. hours in the darkness.d. temperature.