UNIT 6 KNOWLEDGE TEST QUESTIONS

An organism that can only obtain energy by breaking the bonds of inorganic molecules and utilizes CO2 as its only source of carbon is a chemoautotroph.

true

Prokaryotes were the first organisms to perform photosynthesis but were not the first organisms to perform nitrogen fixation.

false

The action of which of the following was required in order for the evolution of organisms with Oxygen-dependent respiratory metabolism to take place?

cyanobacteria

What type of organism uses light for energy and carbon dioxide for the carbon source?

photoautotroph

On a per-molecule scale, nitrous oxide (N2O) is a more potent greenhouse gas than carbon dioxide (CO2).

True

Which of the following is TRUE about global Nitrogen fixation in the second half of the 20th century?

A. Anthropogenic nitrogen fixation increased.

Conversion of ammonium to nitrate requires oxygen.

true

Deposition of ammonia on the land in North America has been decreasing since 1988.

False

The seeds of angiosperms and gymnosperms contain spores.

False

The evolution of vascular tissue is associated with large increases in size of many land plant groups compared to ancestral plants.

true

Which of the following is a synapomorphy for the group [angiosperms+gymnosperms]?

seeds

Which of these character state changes occur on the phylogeny of land plants?

Change from dominant gametophyte to dominant sporophyte

Which of the following processes first evolved in prokaryotes?

all of the above

An organism that lives in a completely dark environment and obtains its carbon from organic material is a chemoautotroph.

FALSE

The most recent common ancestor of all eukaryotes had mitochondria, which evolved from bacteria.

true

Which of the following is the most potent greenhouse gas?

nitrous oxide (N2O)

Greenhouse gases are called by that name because they act to trap heat in the atmosphere.

true

Why is the use of agricultural fertilizer often associated with overgrowth of algae in nearby bodies of water?

because nitrogen in the fertilizer increases algae growth rates

The seeds of a conifer are produced in the microstrobili.

false

Among seed plants, the conifers is the group with the greatest number of species.

false

 Use the phylogeny above to answer this question: All taxa in the phylogeny have photosynthesis.

true

Which of the following would provide the best explanation for the observation that prokaryotes are much more diverse in their metabolism and in their habitats than eukaryotes.

Prokaryotes came into existence billions of years before Eukaryotes and had a longer time to adapt and diversify than eukaryotes.

Which of the following processes does NOT turn nitrogen gas from the air into a usable form?

denitrification

Why is is the concentration of oxygen (O2) important for the cycling of nitrogen?

Both A and B are true

what do greenhouse gases do

Absorb infrared radiation and redirect heat energy towards Earth.

Which of the following are flowering plants (angiosperms)?

all of the above

the endosperm is a major food source for humans

true

Angiosperms Figure 1) Using the table in the figure, correctly match the angiosperm terms with the appropriate explanation. Each term has one explanation. (A-C indicates A in the left column matching with C in the right column)

 

A-A, B-D, C-E, D-B, E-C

In gymnosperms and angiosperms, spores are produced __________________ the plant via _______________.

inside, meiosis

Which of the following statements about corn reproduction is true?

Each seed is formed by two fertilization events

(Early land plants figure 4) Use the moss life cycle in the figure to answer this question. Mitosis occurs at which of the following points in the life cycle?

1, 3, & 4

In both ferns and seed plants, the sporophyte is the dominant form in the life cycle.

true

Evidence that mitochondria evolved from bacteria exists in the form of

C. Both A and B are correct

An interaction between organisms in which both organisms experience lowered fitness is...

competition

An interaction between organisms in which one organism experiences increased fitness and one organism experiences decreased fitness is

herbivory

The bacteria in our digestive system

all of the above (mediate, produce, help)

Which of the following statements about fungi is true?

all of the above (obtain energy, multi/uni, parasites)

Which of the following statements (A-C) about pollinators is false?

E. None of the above (A-C) are false

What are the types of ecological services important to humanity?

all of the above

Which of the following statements about corn is true?

all of the above

Use the moss life cycle figure above to evaluate whether the following statement is True or False: Structure D is a zygote.

true

n mosses, gametes are produced through ____________ and spores are produced through _________.

Mitosis; meiosis

Which of the following is a way in which corals reproduce?

all of the above

Most land plants cannot grow well without

mycorrihzal fungi

You eat corn on the cob (the ear). Which statement is true?

you have consumed embryos and endosperm

Which of the following statements about pollinators is false?

none of the above

The concept of ecosystem services is important because

all of the above

Look at the diagram of a corn plant in the figure. Which statement is true?

Spores are produced at locations 1 and 3