Exam 1 example Review

Question 1

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

Answer 1

Asteraceae

Question 2

Summer annual weeds generally flower and set seed in

Answer 2

fall

Question 3

Winter annual weeds generally flower and set seed in

Answer 3

spring

Question 4

Annual bluegrass is an example of a

Answer 4

winter annual

Question 5

Black nightshade is an example of a

Answer 5

summer annual

Question 6

Bull thistle is an example of a

Answer 6

biennial

Question 7

Field bindweed is an example of a

Answer 7

perennial

Question 8

Barnyardgrass is an example of a

Answer 8

C4 plant

Question 9

Weeds that remain partially above water and do not change with the level of water are called

Answer 9

emersed

Question 10

Cattail is a — type of weed

Answer 10

emersed

Question 11

The stems that grow along the surface, from which roots and shoots arise the following year are called

Answer 11

stolons

Question 12

Sedges generally propagate by

Answer 12

rhizomes

Question 13

Which of these is an example of a parasitic weed

Answer 13

broomscape

Question 14

The failure of weed seeds to germinate even when the environment conditions are favorable for germination is called

Answer 14

dormancy

Question 15

Weeds compete with crops for

Answer 15

water, nutrients, and light

Question 16

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

Answer 16

interspecific

Question 17

The weed density at which the value of the loss due to weed competition exceeds the cost of control is called

Answer 17

economic threshold

Question 18

The terms used to describe the consumption of weed seeds by insects is called

Answer 18

predation

Question 19

To be considered noxious, a plant has to be listed on a noxious weed list maintained by

Answer 19

CDFA

Question 20

Those weeds that are prohibited until more information as to their invasiveness can be determined fall under which of these noxious rating

Answer 20

Q

Question 20

The grass carp was successful in controlling which of these species in Imperial District

Answer 20

Hydrilla

Question 21

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

Answer 21

Puccinia chondrillina

Question 22

Which of these photosynthetic pathways do you think more competitive plants will have

Answer 22

C4