Exam 3

Question 1

Look at sporic meiosis life cycle. general or other. labels for each stage and ploidy of each

Question 2

In seedless vascular plants, the gametophyte is reduced and the sporophyte is the dominant generation.

Answer 2

true

Question 3

Identify the ploidy (haploid or diploid) and structure located at the tip of the arrow in the figure below.

Answer 3

microsporophyll, 2n

Question 4

Genus Equisetum may be the oldest surviving plant genus on Earth! Which life history stage does the structure in the image below represent?

Answer 4

sporophyte

Question 5

following traits with the correct group
hydroids and leptoids

Answer 5

bryophytes

Question 6

following traits with the correct group
dominate gametophyte

Answer 6

bryophytes

Question 7

following traits with the correct group
tissue system present

Answer 7

Horsetail

Question 8

following traits with the correct group
heterosporous

Answer 8

Selaginella (Resurrection plant) having 2 kinds of spores-microspores & megaspores n

Question 9

following traits with the correct group
presence of gemma cup

Answer 9

Marchantia (liverwort)

Question 10

following traits with the correct group
presence of seeds

Answer 10

gymnosperms

Question 11

gemma cups ploidy

Answer 11

n,asexual rep

Question 12

placenta in marchantia

Answer 12

n

Question 13

seta

Answer 13

2n

Question 14

capsule

Answer 14

n

Question 15

In Bryophytes, fertilization takes place in the:

Answer 15

archegonia

Question 16

the gametophyte

Answer 16

occurs in organisms having sporic meiosis

Question 17

In mosses, sporophylls are found on the gametophyte.

Answer 17

false

Question 18

In Bryophytes, rhizoids attach the organism to the substrate and are usually considered true roots.

Answer 18

false

Question 19

Carl Linnaeus’ claim to fame was largely due to the introduction of the binomial (“two-term”) system of nomenclature.

Answer 19

true

Question 20

Heteromorphic generations is characteristic of all organisms having alternation of generations.

Answer 20

false

Question 21

Briefly describe how the pressure flow hypothesis works and where it occurs? You are free to write, draw (providing labels/short descriptions) or use a combination of both to answer the question.

Question 22

Which of the following would not be considered a “sink”?

Question 23

The pressure-flow hypothesis describes

Question 24

When carbohydrates are loaded in the phloem, the flow of water will move from the phloem to the xylem.

Question 25

In horsetail (Equisetum), the sporangiophore contains ____________ that are/is _____________ (assume meiosis has occurred).

Answer 25

spores, n

Question 26

In seedless vascular plants, the presence of vascular tissue supported smaller growth forms in this group.

Answer 26

false

Question 27

Explain how each of the following factors affects the rate of transpiration:

a) temperature

b) humidity

c) soil moisture

Question 28

You are doing research in the African Sahel region. You determine that millet (a grain crop grown in the Sahel) biomass production is 900% greater when grown together with Guiera senegalensis (a native woody shrub) compared to millet grown without the native woody shrub. What is likely contributing to the 900% higher production of millet when grown under G. senegalensis?

Answer 28

increased water availability

Question 29

Water movement from roots to shoots (plant canopy) is best described as

Answer 29

being pulled from the top

Question 30

The cohesion-tension theory is based on all of the following except

Answer 30

changes in pressure potential in the phloem.
includes:
* properties of water molecules
* differences in water potential from roots to shoots
* water loss from the stomata (transpiration)

Question 31

In the soil-plant-atmosphere continuum, which has the lowest (more negative) water potential?

Answer 31

atmosphere

Question 32

Generally, water molecules from the phloem replace molecules that evaporate from the leaf surface.

Answer 32

false

Question 33

The figure of sap flow (below) confirms that water is pushed from the roots to the shoots.

Answer 33

false

Question 34

Guttation

Answer 34

• forces water out through the leaves
• occurs at night when transpiration slows
• is one example of water loss by + root pressure

Question 35

The bordered pits can prevent embolism from expanding in the tracheids.

Answer 35

true

Question 36

Cavitation (embolism) can occur in the xylem of vascular plants that experience prolonged drought.

Answer 36

true