Horticulture PSC 1800 test 1
When a second sperm nucleus unties with other tissues in the ovary to make endosperm, what is the ploidy level of that endosperm?
3n
If I have a homozygous dominant plant and I cross it with a homozygous recessive plant and get 4 offspring (F1), how many of the 4 offspring will have the dominant trait?
4
Which plant is a hybrid or cross between two genera (plural of genus)? A. Platanus x acerifolia B. X Fatshedera C. Caryopteris x clandonensis D. Rosa rugosa
B) X Fatshedera
_____ results in the splitting of a single cell into 2 identical daughter cells, while _____ results in the formation of gametes that are haploid.
Mitosis and Meiosis
Is this plant a monocot or a dicot? ( left side #3) (buttercup appearance)
Monocot
The leaves below has _________ venation.
Pinnate
The fruit below is classified as a(n): (apple)
Pome
Is this plant a monocot or a dicot? ( big red leaf)
dicot
Double fertilization only occurs in gymnosperms.
false
For a plant to be monoecious, it must have perfect flowers.
false
Many GMOs are commonly used among horticultural crops.
false
Plants in a juvenile phase or state will flower if the correct light conditions are met.
false
Soil science and entomology have very little to do with horticulture.
false
There are no jobs in horticulture that require extensive training and/or education.
false
elect all of the DEHISCENT dry fruits in the list below. nut acorn samara follicle achene schizocarp legume (pod) caryopsis silique capsule
follicle legume (pod) silique capsule
Which of the following is NOT a benefit of horticultural crop genetic improvements?
improved photosynthetic efficiency
Which of the following is NOT a benefit of heterosis? better characteristics inbreeding depression increased vigor increased size
inbreeding depression
Is this plant a monocot or a dicot?
monocot
Fruits that form without fertilization are called _________________ fruit. They are seedless.
pathenocarpic
Which field related to horticulture requires an extensive background in genetics?
plant breeding
The inflorescences in the picture below are:
racemes
Describe the flower below by selecting all that apply. (Assume that after the flowers have faded, the picture on the left is what it looks like) (dead)
regular perfect complete
What is the best way to avoid building resistance to pesticides in a weed population?
rotate pesticide modes of action
All of the following are examples of adventitious roots, EXCEPT: holdfasts stolons brace or prop roots contractile roots
stolons
Plants are classified into 2 categories in terms of their tolerance to frost or freezing [frost] and hardy.
tender
Even though a capitulum looks like a solitary flower, it is really many flowers.
true
Olericulture is the study of ____________________.
vegetables
Which qualities generally mean production is horticulture versus agronomy? Select all that apply.
- product is for fresh consumption - product is for aesthetics or entertainment
_____ are human-selected clones that are propagated and maintained vegetatively or asexually, while _____ are sexually propagated or bred plants that are NOT clones, but look similar enough generally that they look like they are.
1. Cultivar 2. Line
___ have 2 seed leaves, flower parts in multiples of ___ or ___ (List flower part multiples from least 0 to greatest 10) and have _____ veins, while _____ have 1 seed leaf, flower parts in multiples of ___ and ____ veins.
1. Dicots 2. 4s 3. 5s 4. Net-like 5. Monocots 6. 3s 7. Parallel
_____ tissue moves food around the plant and is mostly living tissue, whereas ______ tissue is mostly dead tissue at maturity and moves water up through the plant.
1. Phloem 2. Xylem
Match the term on the left with the best description on the right. alternate opposite whorled
1. one bud per node 2. two leaves per node 3. 3+ leaves per node
Which if the following doesn't fit into the group of modified stems? spur corm rhizome bract
Bract
Which one of the following botanical plant names is formatted correctly? A. Platanus Occidentalis B. Beucarnia recurvata C. Eleagnus angustifolia D. Picea pungens f. glauca
C
_____ stores the genes that control an organism. _____makes proteins that fulfill plant functions based on the genetic code.
DNA and RNA
What is the difference between and herbaceous plant and a woody plant?
Herbaceous plant tissue are "soft"
The fruit below is classified as a(n): (peach)
Drupe
Which botanical classification level is most similar to the last name in a family?
Genus
Polyploidy generally makes plants more vigorous and productive.
True
Which of the following is NOT a plant adaptation that ensures cross-fertilization? dichogamy self-incompatibility xenia doecy
Xenia
What is the cause of inbreeding depression?
accumulation of too many recessive genes
Blueberries, azaleas and rhododendrons are _____________ because they love having soil with a pH less than 7.
acidophiles
Seeds that form inside a fruit WITHOUT fertilization contain embryos that are clones. This process is called ______________.
apomixis
Botany is the hard science behind the ____________________ science of horticulture.
applied
Which description best characterizes the leaf below?
bipinnately compound
Which leaf pigment does not contribute to fall color of deciduous leaves?
cholorophyll