Bio quiz 10

Approximately what proportion of the radiant energy entering an ecosystem is used in photosynthesis?

1%

Which is the gametophyte form of most liverworts?

A thallus

From an evolutionary perspective, true nerve cells are first seen in the phylum:

Cnidaria

Which protist group is characterized by having a micronucleus and a macronucleus?

Ciliates

Which of the following is an INCORRECT statement regarding a community in the natural world?

Communities refer to ecological categories that vary greatly in size and have precise boundaries.

A biological community and its abiotic environment together comprise which of the following?

Ecosystem

Gross primary productivity is the rate of photosynthesis minus the rate of plant respiration.

False

The cell walls of fungi are composed of cellulose.

False

One true characteristic of all animals is that they:

are heterotrophs.

Dolphins share synapomorphies with mammals.

True

A bacterium that uses the oxidation of inorganic compounds to provide energy for manufacturing nutritious organic compounds is a:

chemoautotroph.

Like fungi, chytrid cell walls contain which of the following?

chitin

In Experimental Condition 2 of the accompanying figure, the distribution of Chthamalus suggests that:

interspecific competition kept Chthamalus from extending lower into the intertidal area.

Allopatric speciation is often exemplified in which type of geographical area or biome?

islands

Scientists may compare similarities between nucleotide sequences of organisms to determine their evolutionary history. This is known as:

molecular systematics.

The accompanying figure represents a

pyramid of biomass.

Charles Darwin called choosing a mate based on its color or some other characteristic:

sexual selection

Generally, r-selected organisms exhibit:

short life spans and early maturity

When r = −0.00057, the population size:

will decrease

Which is a unique adaptation in insects not found in any other arthropod?

wings

Based on the accompanying figure, which of the following age intervals has the highest death rate?

0-1

Which of the following is NOT an opisthokont, a monophyletic group characterized by a posterior flagellum on motile cells?

Algae

Which statement about allopolyploidy is FALSE?

Allopolyploidy accounts for a large portion of the remarkable species diversity observed on Earth today.

What is the male sexual structure that produces sperm in plants?

Antheridium

The most common mode of reproduction in bacteria is:

Binary Fission

How do bacteria move?

By means of a rotating flagella

As bilateral symmetry evolved, natural selection led to which of the following?

Cephalization

Which were the first organisms to release oxygen by photosynthesis?

Cyanobacteria

Members of which group are known to form blooms known as red tides?

Dinoflagellates

Which is an example of a monocot?

Onions

Refer to the accompanying figure. What is missing in the filament labeled as A?

Septa

Fossil fuels, such as coal and oil, are derived from which biogeochemical cycle?

The carbon cycle

Which statement about decomposers is FALSE?

They include bacteria but not fungi.

What is the function of the sepal of a flowering plant?

To protect the flower bud

An alloploid contains multiple sets of chromosomes from a single species.

false

K strategists typically produce large numbers of offspring.

false

Organisms that eat plants exclusively are known as______.

herbivores

Two mammals, a sheep and a goat, produce offspring. Only the F1 and F2 generations produce fertile offspring. This occurs as a result of:

hybrid breakdown

Which describes the death of an interspecific embryo that failed to develop?

hybrid inviability

Another name for horizontal gene transfer is____________.

lateral gene transfer