The process in which an embryo sporophyte resumes growth after a period of dormancy is ________. germination budding phototropism senescence 1 2 3 4 5

Plant cells differentiate in size, shape, and function during the process of ________. germination dormancy growth development 1 2 3 4 5

Which of the following is not a class of hormones that controls plant growth? auxins phytochromes cytokinins gibberelins 1 2 3 4 5

Which of the following is a common application of the hormone ethylene? to promote root formation in cuttings to propagate tissue cultures to ripen green fruit to induce dormancy for shipping 1 2 3 4 5

In order for a hormone to influence a plant cell, it must first ________. enter the cell by diffusion enter the cell by active transport activate a membrane receptor bind to a phagocyte 1 2 3 4 5

Water induces embryonic plant cells to release the hormone ________. gibberelin ABA ethylene auxin 1 2 3 4 5

Which hormone is produced in the coleoptile tip to induce elongation? amylase abscisic acid ethylene auxin 1 2 3 4 5

Auxin causes cells to elongate by the process of ________. photosynthesis polar transport gravitropism solar tracking 1 2 3 4 5

Plant movements in response to environmental stimuli are called ________. trophic cycles tropisms abscission senescence 1 2 3 4 5

Phototropism is dependent upon the action of the hormone ________. amylase abscisic acid ethylene auxin 1 2 3 4 5

The curling of vines and tendrils in response to contact is called ________. phototropism thigmotropism gravitropism photosynthesis 1 2 3 4 5

Mechanical stress (shaking) can cause plants to ________. grow taller bend toward the stimulus produce curling tendrils have shorter stems than greenhouse plants 1 2 3 4 5

A biological response to changes in the length of darkness or light in a circadian rhythm is known as ________. thigmotropism phototropism photoperiodism photosynthesis 1 2 3 4 5

The pigment phytochrome (Pfr) is involved in all of the following plant functions except ________. germination flowering thigmotropism dormancy 1 2 3 4 5

Photoperiodic plants flower in response to ________. day length night length age temperature 1 2 3 4 5

Low-temperature stimulation of flowering is known as ________. acclimatization polarization vernalization abscission 1 2 3 4 5

The dropping of plant parts at the end of a growing season is called ________. abscission dormancy senescence vernalization 1 2 3 4 5

A state of dormancy is induced by ________. short days long, cold nights dry, nitrogen-deficient soil a combination of the choices 1 2 3 4 5

Senescence is the segment of the life cycle from ________ to ________. seed formation, germination dormancy, vernalization budding, dormancy maturity, death 1 2 3 4 5

Which of the following plant movements involves a reversible change in cell turgor? phototropism solar tracking gravitropism thigmotropism 1 2 3 4 5