exam 2 Flashcards


Set Details Share
created 3 years ago by samanthaw4
299 views
updated 3 years ago by samanthaw4
Subjects:
bio 2
show moreless
Page to share:
Embed this setcancel
COPY
code changes based on your size selection
Size:
X
Show:

1

you find a green organism in a pond near your house and believe it is a plant, not an alga. The mystery organism is most likely a plant and not an alga if it _______

is surrounded by a cuticle

2

two characteristics shared by gymnosperms and angiosperms that are absent from earlier plant groups and represent key adaptations to life on dry land are

pollen and seeds

3

plants had to overcome many challenges in order to colonize land. which is NOT one of those challenges?

using carbon dioxide for photosynthesis

4

plant-like photosynthesis that releases O2 occurs in

cyanobacteria

5

In onions (Allium), cells of the sporophyte have 16 chromosomes within each nucleus. How many chromosomes should be in the nucleus of an egg within the embryo sac for prior to fertilization?

8 (gametes are haploid)

6

which of the following structures is important for locomotion for Amoebozoans?

pseudopodia

7

in gymnosperms, dispersal may occur via all the following except

pollen, carried by animals that ingest it

8

a small plant species lives on the edge of ponds and relies on diffusion to bring various molecules to different parts of its body. the evolution of vascular tissue in this plant would allow it to gain which of the following advantage?

the ability to grow taller- increasing spore dispersal

9

Bascillus anthracis is a species that can be fatal to humans if ingested in food or drink. it could be classified as a

pathogen

10

finding which of the following in a cell of an organism would represent evidence of endosymbiosis in the ancestors of the organism?

organelles surrounded by two plasma membranes

11

in the life cycle of the dinoflagellate shown below, the sexual part of the life cycle depicts a

zygotic life cycle

12

which of the following groups is NOT in the same supergroup as land plants

kelp

13

which of the following organisms is most closely related to fungi?

slime mold

14

photoautotrophic bacteria:

produce their own food and obtain their energy from sunlight

15

generalized life cycle for land plants shown in the figure. meiosis is most likely represented by which number(s)?

4

16

nitrogen-fixing cyanobacteria

can use atmospheric oxygen to create organic molecules

17

similar to most amoebozoans, the forams and the radiolarians also have pseudopods, as do some of the white blood cells of animals (monocytes). if one were to erect a taxon that included all organisms that have cells with pseudopods, the taxon would

be polyphyletic

18

which of the following cellular structures is a characteristic of excavates?

feeding grooves

19

around hydrothermal vents, there are many prokaryotes that use energy from hydrogen sulfide (H2S) and build organic molecules using inorganic compounds. these prokaryotes could be called:

chemoautotrophs

20

at the farmer's market, you buy spinach, tomatoes, and bell pepper. all of these foods have in common that:

their ancestors have been affected by both natural and artificial selection

21

you have a pine tree in your back yard and your little cousin marks it with a knife to mark his love for his girlfriend. in 10 years, this mark will be...

at the same height

22

apical meristems

occur in both roots and shoots of plants

23

which of the following mechanisms of horizontal gene transfer in prokaryotes involves a physical connection between two cells?

conjugation

24

the genus of the bacteria Streptococcus pneumonia refers in part to its shape. you can expect that under a light microscope these bacteria should look

round- shaped

(coccus= round)

25

which of the following traits first appeared at #1 in the tree below?

alternation of generations

26

which of the following supergroups contains humans?

Unikonta

27

the domains Bacteria and Archea...

both have DNA that is not contained inside a nucleus

28

the life cycle below is a _____, and the multicellular structure shown in #1 is a ______

alternation of generations, gametophyte

29

protists include...

organisms in four different supergroups, which mostly live in aquatic or moist environments

30

which two domains are most closely related?

archaea and eukarya

31

movement of minerals (nutrients) in a plant should be the slowest in:

bryophytes

32

generally speaking for plants, dispersal is...

advantageous for colonizing new habitats and enhancing genetic diversity

33

plants have many adaptations which allows for life on land. which of the following is one such trait

waxy cuticle

34

which observing a gram stained bacteria, you note that the specimen has a purple color. this means that:

the species peptidoglycan's layer is thick, making it a gram positive bacteria

purple= positive= thick peptidoglycan

35

which of the following is a characteristic that differentiates algae from land plants?

land plants have multiple adaptations to reduce water loss such as stomata and cuticle which algae do not

36

what adaptations should one expect the seed coats of angiosperm species whose seeds are dispersed bu frugivorous (fruit-eating) animals, as opposed to angiosperm species whose seeds are dispersed by other means?

the seed coat should be able to withstand high acidity, and the seed coat should be resistant to the animal's digestive enzymes

37

imagine a hypothetical gymnosperm that has evolved in a remote island of the pacific which has no herbivores. compared to similar species on continents with herbivores, you should expect that the island gymnosperm would have

low levels of secondary metabolites in its leaves

38

in the phylogenetic tree below, which trait appeared at #2?

roots

39

today, there are around 250,000 species of angiosperms, yet fewer than 1000 species of gymnosperms. in many ecosystems, angiosperms also dominate in terms of biomass. which of the following is a likely reason for the success of angiosperms?

their flowers attract pollinators, which enhances fertilization rate and reproductive success

40

you would expect a flagellate to have:

one or two long extensions in its cell, used in locomotion or to create a water current

41

_____ are heterotrophic protists; ______ are photoautotrophic protists.

protozoans... algae

42

which of the following mechanism of horizontal gene transfer in prokaryotes involves viral infections?

transduction

43

a very abundant fruit-eating bird in Texas us particularly attracted to red foods. you would expect that a plant in this area may experience...

directional selection for red fruit

44

which of the following characteristics tends to limit bryophytes and seedless vascular plants to habitats that are relatively moist?

presence of a flagellated sperm

45

rhodophytes and land plants have the following characteristics in common;

-both include organisms that are multicellular

-both can create a habitat for animals

-both can photosynthesize

46

you are hanging out at clearwater beach when a bunch of dead fish come floating by. over the next few hours hundreds more fish wash up on the beach. later, you see on the news that the clearwater marine aquarium responded to several calls about marine animals in distress in the area. based on this info, you would conclude that the organism causing the events is a...

dinoflagellate

47

dry and cool conditions in the terrestrial environment should most favor

seed plants due to their ability to disperse sperm inside pollen

48

compared to gymnosperms, bryophytes have a relatively ____ sporophyte generation, which means that they tend to have comparatively ____ dispersal potential.

small...low

49

a new species of unicellular protists is discovered. this species has a life cycle where the gametes are the only haploid cells produced. gametes cannot divide to form new haploid cells but they may fertilize other gametes to form diploid cells. what type of life cycle is this?

gametic life cycle