Exam 2

Question 1

Interveinal chlorosis appearing in young leaves indicates a deficiency in:

Answer 1

Iron or manganese

Question 2

General chlorosis indicates a deficiency of

Answer 2

nitrogen or sulfur

Question 3

Stunted plants with anthocyanin accumulation in older leaves indicates a deficiency in

Answer 3

phosphorus

Question 4

A plant response to a directional signal such as gravity, light or touch that results in oriented
growth is called

Answer 4

tropism

Question 5

Phytochrome is a plant red light receptor that is photoconvertible between two forms Pr and
Pfr. Phytochrome is a

Answer 5

protein

Question 6

You are a scientist working on conditions that promote seed germination. You found that red
light promotes germination and you wonder whether phytochrome is involved. To test this
hypothesis you treat the seeds with red light followed by

Answer 6

far red light

Question 7

. Phytochrome is used by plants to sense if they are being shaded by other plants. The R/FR ratio
is detected by phytochrome. The R/FR ratio decreases in the shade but why?

Answer 7

because leaves absorb red light

Question 8

Two blue light photoreceptors in plants are:

Answer 8

phototropin and cryptochrome

Question 9

The hormone that causes leaf abscission is:

Answer 9

ethylene

Question 10

When an oat coleoptile is exposed to blue light from one side, the hormone ________________
accumulates on the opposite side of the coleoptile and promotes cell elongation. That makes the
coleoptile grow towards the light.

Answer 10

auxin

Question 11

The hormone that controls plant response to gravity (gravitropism) is called

Answer 11

auxin

Question 12

Inhibition of lateral buds by the shoot apical meristem is called apical dominance. The
hormone that is responsible for apical dominance is:

Answer 12

auxin

Question 13

A hormone that promotes seed germination is

Answer 13

gibberellin

Question 14

Ripening in climacteric fruit is associated with production of this hormone:

Answer 14

ethylene

Question 15

A hormone that inhibits seed germination is:

Answer 15

abscisic acid

Question 16

Which hormone causes the triple response?

Answer 16

ethylene

Question 17

The hormone that is produced during drought stress and causes stomatal closing is:

Answer 17

abscisic acid

Question 18

The part of the gene that mainly controls gene expression is the:

Answer 18

promoter

Question 19

The part of the gene that is transcribed but then spliced out of the transcript is the:

Answer 19

intron

Question 20

A plant is heterozygous for two traits and has a genotype of GgYy. How many different
genotypes will be represented in the gametes of this individual?

Answer 20

4

Question 21

You cross two plants with genotypes GGYY and ggyy and check the genotype of the progeny.
How many different genotypes are found in the progeny?

Answer 21

1

Question 22

If you cross a plant with green pods (GG) with plant that has yellow pods (gg), the percentage
of progeny with green pods will be

Answer 22

100%

Question 23

According to the endosymbiotic theory, chloroplasts evolved from

Answer 23

cyanobacteria

Question 24

Red algae are able to grow at greater depth in the ocean than other algae because they have an
alternative photosynthetic light harvesting complex called

Answer 24

phycobilisome

Question 25

There are two main groups of green algae, the charophytes and the chlorophytes. Land plants
evolved from

Answer 25

charophytes

Question 26

Algae found in the oceans that have a cell wall composed of silica are

Answer 26

diatoms

Question 27

Agar, carrageenan, and algin are polysaccharides that are used the food industry. They are
produced by

Answer 27

algae

Question 28

Fungi are chemoheterotropic and that means that fungi

Answer 28

obtain their energy and carbon from organic sources

Question 29

Fungal cell walls are made from

Answer 29

chitin

Question 30

The fungi we discussed in class that have swimming spores are in the

Answer 30

Chytridiomycota

Question 31

The fungi that form endomycorrhizal symbiotic interactions with plants are in the

Answer 31

Glomeromycota

Question 32

Nori seaweed is made of

Answer 32

red algae

Question 33

Lichens are mostly symbiotic associations of fungi in the ___________________ with either algae or cyanobacteria

Answer 33

Ascomycota

Question 34

In bryophytes, meiosis produces the

Answer 34

spores

Question 35

In bryophytes, spores are produced by the

Answer 35

sporophyte

Question 36

In Bryophytes, fertilization occurs in the

Answer 36

archegonium

Question 37

In Bryophytes, the zygote grows and becomes the

Answer 37

sporophyte

Question 38

In Bryophytes, the ___________________ is dependent.

Answer 38

sporophyte

Question 39

In Lycophytes the gametophyte

Answer 39

is subterranean

Question 40

The rhyniophytes are the first land plants to have true stems with central conducting tissue
containing lignin. The first land plants to have true stems, leaves, and roots are the

Answer 40

Lycophytes

Question 41

Club mosses have a dominant sporophyte generation that make spores in sporangia, they do
not make seeds. They have true vascular tissue. Their gametopytes are subterranean. They belong
to the

Answer 41

Lycophytes

Question 42

True ferns belong to the

Answer 42

Monilophytes

Question 43

In true ferns, sori on the underside of leaves are clusters of leptosporangia that produce
spores. When the spores germinate they grow into

Answer 43

gametophytes

Question 44

In true ferns, meiosis occurs in

Answer 44

leptosporangia

Question 45

Stomata and a cuticle first appeared in

Answer 45

Bryophytes