Exam 1

Question 1

Which plant (C3/C4) will have the competitive advantage in elevated CO2 levels?

Answer 1

C3

Question 2

Which plant (C3/C4) will have the competitive advantage in drought stress?

Answer 2

C4

Question 3

Which plant (C3/C4) will have the competitive advantage in lower light or shade conditions?

Answer 3

C3

Question 4

Which plant (C3/C4) will have the competitive advantage in lower relative temperature?

Answer 4

C3

Question 5

What is a plant resricted to acid soil conditions as the area in which it can grow and develop?

Answer 5

obligate acidophile

Question 6

Simple term for reproductive success?

Answer 6

Fitness

Question 7

Triangular stem with tree-ranked leaves, mostly glaborous, adapted to high water content. Moncot. Plant family???

Answer 7

cyprusaceae

Question 8

Primarily herbaceous vines, funnel-shaped, radially symmetrical flowers. Dicots. Plant family??

Answer 8

covulvaceae

Question 9

Succulent leaves and stems, leaves normally simple, prosuces poisonous latex or milky sp. Dicots. Plant Family???

Answer 9

Euphorbiaceae

Question 10

Five reproductive characteristics of successful weeds?

Answer 10

1) Largely self fertilixed but outcrossing is possible. 2) Pollination by wind or isect generalists 3) Produce maasive quantities of seed 4) Seed germination influenced by environmental cues. 5) Dual modes of reproduction (seed and vegetative).

Question 11

Three beneficial aspects of weeds?

Answer 11

1) Protection/food for wildlife and insects. 2) Primary-successional plants (stabilize soil). 3) Lower disease pressures bc of plant diversity.

Question 12

Cruciform arranged claw petals; produces glucosinolates. Plant family?

Answer 12

Brassicaceae

Question 13

Simple leaves alterante with clammy appearance; produces alkaloids. Plant family?

Answer 13

Solanaceae

Question 14

Composites of individual flowers, seed elogated for wind dispersal. Plant family?

Answer 14

Asteraceae

Question 15

Produces ocrea. Plant family?

Answer 15

Polygonaceae

Question 16

Simple leaves, opposite or alternate; compact flowering stem at apex of of plant. Plant family?

Answer 16

Amaranthaceae

Question 17

Two classes of parasitic weeds?

Answer 17

dodders and witchweed??? Unsure. Edit

Question 18

A plant that is considered harmful to other plants or the environment as defined by Federal Seed Act of 1939?

Answer 18

Noxious Weed

Question 19

Impliess that a given weed species, including seed seed and vegetative reproductive parts, have been killed or completely removed from a given area and the weed will not reappear unless reintroduced.

Answer 19

Eradication or localized extinction

Question 20

Term used to describe chemicals produced by plant on other surrounding plants. Negative chemical effects of one plant on another.

Answer 20

Allelopathy.

Question 21

Three main types of biotic agents?

Answer 21

Insects, Parasitic organisms, herbaceous organisms

Question 22

Three problems associated with weds in animal production?

Answer 22

Direct Toxicity, decreasesd carrying capacity, Aggravation and annoyance

Question 23

Soybeans, peanuts, white clover. Plant Family?

Answer 23

Fabaceae

Question 24

Sheathed leaves, ligule, collar, awns. Plant family?

Answer 24

Poaceae

Question 25

What is a weed?

Answer 25

A plant that originated in a natural environment and in response to imposed or natural environments, evolved and continues to do so as an interfering associate to our crops and activities (humans breed weeds)

Question 26

General growth characteristics of a weed?

Answer 26

1) Rapid seedling growth. 2) quick maturation and conversion to reproduction stage 3) Environmental platicity 4) ability to capture a DISPROPORTIONATE amount of resources in competion with a desirable plant

Question 27

Three Indirect costs of weeds?

Answer 27

seed contamination (reduced seed quality and dockage), reduction in crop yield, interference when harvesting