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N/L Questions > 101-150 > Flashcards

101-150 Flashcards

1
Q

Most woody plants are propagated by ______.

A

Cuttings

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2
Q

When studying insects that affect our gardens, crops, and goods, agriculture we must first learn..

A

how to identify the insects

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3
Q

Biological and chemical controls of harmful insects are closely tied to…

A

where, when, and how insects develop

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4
Q

Many chemical insecticides were developed after…

A

World war one

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5
Q

Many beneficial insects need to be _____ when it is economically feasible.

A

protected and promoted

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6
Q

Insects, like all other plants and animals, are classified by…

A

binomial nomenclature

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7
Q

Insects are grouped based on similarities and types of development. An example would be…

A

type of legs, mouthparts, absence or presence of wings

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8
Q

Mouthparts, wings and type of metamorphosis are characteristics used to….

A

Identify an insect

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9
Q

Names of insects end with -idae. An example is Aphidae.

A

Family

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10
Q

The names of most insect orders have the ending -petra, which means…

A

The insect possess wings in the adult stage

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11
Q

_______ names refer to large groups rather than individual species.

A

Common

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12
Q

Insects are in the class insecta becasue they possess the following characteristics…

A

three body regions, three pairs of jointed legs, one pair of antennae and one or two pairs of wings

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13
Q

There are three regions of an insects body, which of the following is NOT correct?

A

Wings

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14
Q

Piecing-sucking, lapping, and sponging are all examples of…

A

Mouthparts

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15
Q

This part of an insects body is mostly membranous and has a frame work of veins.

A

Antennae

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16
Q

The most important characteristic for the insects is the presence of three…

A

Pairs of jointed legs

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17
Q

Insects use this to feel their way, detect danger, locate their food find their mates and in some cases to communicate.

A

Antennae

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18
Q

The term “metamorphosis” literally means a change in ______.

A

form

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19
Q

This part of an insect has a great deal of variation and can be used fro identification.

A

Wings

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20
Q

A newly emerged insect feeds ravenously, but the extent of its growth is restricted by ___.

A

Rigid exoskeleton

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21
Q

The process of an insect shedding its outer skin is called ________.

A

Molting

22
Q

Gradual metamorphosis includes which of the following stages of development?

A

Egg, nymph, adult

23
Q

Complete metamorphosis includes which of the following stages of development?

A

Egg, larvae,pupa, adult

24
Q

During simple metamorphosis each development stage is called ____.

A

instar

25
Q

Of the 80,000+ diseases that attack plants in the U.S., over 30,000 attack crops that are ____.

A

Economic importance

26
Q

The vegetative structure of a fungus is made of thread-like material known as

A

mycelium

27
Q

Fungi, bacteria, viruses, and nematodes are 4 major groups of plant parasitic organisms which cause

A

plant disease

28
Q

There are ____ types of plant diseases.

A

two

29
Q

Nematodes that insert a spear-like mouth part into the root tissue, inject a chemical substance then withdraw plant material as it feeds to belong to a group called ____.

A

Nematodes

30
Q

Bread mold is a ____ which produces a thread-like vegetative structures.

A

Fungus

31
Q

Nematodes that feed by completely entering the plant root are called ____.

A

Endoparasites

32
Q

Scorch is a _____.

A

Burning of leaf margins as a result of infection or unfavorable environmental conditions.

33
Q

Witches broom is a ______.

A

Broom like growth or massed proliferation caused by the dense clustering of branches in woody plants.

34
Q

Bacteria cells may divide every _____.

A

20-30 minutes

35
Q

Beneficial fungi are called ____.

A

Saprophytes

36
Q

Fungi most commonly reproduce ______.

A

Asexually

37
Q

Nutrient deficiencies, lack of or excess soil moisture, too low or too high temperatures are all examples of ______ plant diseases.

A

Non-pathogenic

38
Q

A parasite or an organism that attacks a plant can be referred to as a _____.

A

Pathogenic

39
Q

A susceptible host, a parasitic organism, environmental conditions are three factors always present for a _______ disease.

A

Pathogenic

40
Q

A fungus is a multi-cellular organism which has NO roots, stems, or leaves and ______.

A

Cannot make its own food

41
Q

The formation of spores, sclerotia, and mycelia fragments refer to the process of

A

fungi reproduction

42
Q

______, a common disease in ornamental plants which causes the damping off of young vegetable plants is spread by mycelia fragments.

A

Rhizoctania

43
Q

These structures can remain viable in the soil for several years until a susceptible crop is planted. They form when the mycelium of some fungi become hard.

A

Sclerotia

44
Q

Fungi that form in swimming spores thrive in low, wet areas and cause diseases such as root rot. These types of fungi are known as _____.

A

Phycomycetes

45
Q

This is an advanced group of fungi. They produce spores on special structures inside plant tissue.

A

Ascomycetes

46
Q

Practically all types of fungi produce their asexual spore on exposed stalks called and resemble a small plant with fruit hanging on it.

A

Conidiophores

47
Q

Inoculation, penetration, infection, incubation, invasion, reproduction, over wintering are stages in the life cycle of a ______.

A

Fungus

48
Q

Direct penetration, penetration through stomates or through wounds is necessary in order for ____ to occur.

A

Infection

49
Q

______ are spread by blowing rain, insects, humans and inside seeds.

A

Bacteria

50
Q

Symptoms of this include mottled or puckered leaves streaks on leaves and at times distorted fruit.

A

Virus

N/L Questions (5 decks)

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