Exam 1 Review

Question 1

Most agricultural weeds are

Answer 1

r-strategist

Question 2

The family that comes second in terms of the greatest number of the world’s worst weeds after Poaceae

Answer 2

Asteraceae

Question 2

A group of populations that co-occur in the same space and the same time is known as

Answer 2

community

Question 3

When two or more plants of the same species coexist in the same time and space and make simultaneously demand for a limited resource, the competitive situation is called

Answer 3

intraspecific

Question 4

Which of these photosynthetic pathways do you think grasses generally have

Answer 4

C4

Question 5

Glyphosate (Roundup) was introduced in the

Answer 5

1970s

Question 6

Johnsongrass is an example of a

Answer 6

perennial

Question 7

Which of these is considered as the 1st exotic plant pathogen for successful control of rush skeletonweed?

Answer 7

puccinia chondrillina

Question 8

Duckweed is a — type of weed

Answer 8

floating

Question 9

Which of these is an example of a noxious weed

Answer 9

Japanese dodder

Question 10

Cheeseweed is a —- plant

Answer 10

C3

Question 11

The family with the greatest number of the world’s worst weeds is

Answer 11

Poaceae

Question 12

Redroot pigweed is —– plant

Answer 12

short-day

Question 13

An example of a biennial plant is

Answer 13

Bull Thistle

Question 14

Most small seeded annual weeds are

Answer 14

r-strategist

Question 15

Prostrate spurge is a — plant

Answer 15

C4

Question 16

In crop-weed competition the nutrient that becomes limited first is

Answer 16

N

Question 17

Weed seeds with hard seed coats have to be a — in order to germinate

Answer 17

scarified

Question 18

The fluffy structure that helps Asteraceae weed seeds disseminate is called

Answer 18

pappus

Question 19

When seeds fail to germinate under normally ideal environment because of conditions within the seed the process is called

Answer 19

innate

Question 20

Summer annual weeds generally flower and set seed in

Answer 20

fall

Question 21

Use of cover crops for weed control is an example of

Answer 21

cultural control

Question 22

Which of these species can be toxic to horses

Answer 22

yellow star thistle