Horticulture Quiz 3

The best definition of hydrotropism...

is a response of the pant, specifically, the roots, to available soil water

Which plant hormone is responsible for cell growth and expansion?

auxin

Plants that require full, need __ hours of direct sunlight daily

6-8

In a greenhouse, the content of CO2 of the air is manipulated to manage...

photosynthesis

What is the term that describes the transferring of pollen from anthers to stigma?

pollination

Plants resulting from asexual reproduction will be a clone of the parent plant..

true

In the discussion of photosynthesis and respiration, the word "sink" is used to refer to locations where glucose and sucrose are delivered. Which of the following are potential "sinks" within a plant? (select ALL that apply)

all of them

Which plant hormone is responsible for fruit ripening?

ethylene

Thigmotropism is a growth curvature in response to which of the following?

touch

The closing of the guard cells (stomata) in times of drought is controlled by which hormone?

abscisic acid

Translocation involves...

the movement of glucose from the leaves to the flowers

Plants produced by sexual reproduction will... (check ALL that apply)

-require pollination unless they are parthenocarpic or apomixic -require either a perfect flower, or male and female flowers open at the same time in proximity of each other

Which of the following is a synthetically made hormone that promotes rooting in plant propagation?

auxin

A growth response called phototropism is a plant's response to which of the following?

light

Plant stems are lengthened by which plant hormone?

gibberellins

Which plant component absorbs light?

chlorophyll

Geotropism is a growth curvature in response to which of the following?

gravity

A plants that responds to photoperiod will...

flower or grow respond to the day length (actually, in reality, the length of dark)

Mutants are most likely to be created by which form of reproduction?

sexual

The best way to describe plant ET (Evapo-Transpiration) is as ...

a method to estimate or measure the amount of water a plant needs

Which of the follow best describe Photosynthesis ... (select the SINGLE best answer)

the conversion of light energy to sugar, which is plant energy