Exam 40: Sensory Systems in Plants

In Arabidopsis plants, about 10% of its genome is devoted to processes tied to which molecule?

A viticulturist wants to grow larger grapes.Which specific hormone would a viticulturist apply to the plants?

Which naturally-occurring plant hormone has a major role in the phototropic response of plants?

In some genetically engineered tomatoes, fruit ripening was delayed by crippling the gene that produces which hormone?

Climbing plants, such as vines, rely on touch to navigate and develop tendrils that coil around objects they encounter.Roots also rely on touch to navigate their way through the soil.When roots come into contact with an object, they generally grow in a direction away from the object.Based on this information, which of the following statements is true?

Charles Darwin and his son experimented with which plant growth response?

What endogenous process helps plants to keep their movements and other responses synchronized with the environment?

A plant sustains pathogen-induced damage to one of its cell walls.A gene-for-gene response soon follows and the tissue surrounding the injury soon dies.Which signaling molecules facilitated this response?

One effect of auxin, which triggers the elongation of cells, is to affect cell walls by increasing their

Coconut milk was an extremely useful additive in plant tissue culture because, in addition to amino acids, it contains

The acid growth hypothesis links

_______________ are chemical substances produced in small quantities in one part of an organism and then transported to another part of the organism, where they bring about physiological responses.

The elongation of stems is stimulated by

Before ARF transcription factors can trigger auxin-induced gene expression, what must happen?

Abscisic acid (ABA) is synthesized in the roots in response to decreased soil water potential.ABA then translocates to the leaves, where it rapidly alters the osmotic potential of guard cells.What effect would this have on the stomata and the process of transpiration?

Rapid turgor pressure changes in specialized multicellular swellings called ____________ are associated with leaves that move in response to touch or light.

Red light and phytochrome are involved in which of the following plant growth responses? Check all that apply._____ thigmotropic responses __X__ inhibition of seed germination __X__ elongation of etiolated shoots __X__ detection of crowding by neighboring plants

How do nastic movements differ from tropisms?

Gibberellins affect many processes in plants.In seeds embryos, gibberellins are believed to signal hydrolysis of the stored food reserves through inducing the synthesis of the enzyme $\alpha$ -amylase.Which food source are gibberellins targeting with the release of $\alpha$ -amylase?

Why do plants growing outside often have shorter and thicker stems than plants of the same species grown indoors?