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