Mastering Biology Ch. 1

Which of the following is an example of homeostasis?

A decrease in body temperature often results in heat production by muscles through shivering.

Prokaryotic cells are found in the domain(s) _____.

Bacteria and Archaea.

To which of the following domains do unicellular organisms that lack nuclei belong?

Both Archaea and Bacteria.

Which of these is an organ system?

Digestive.

A human is classified in domain _____ and kingdom _____.

Eukarya ... Animalia

A rose bush is classified in domain _____ and kingdom _____.

Eukarya ... Plantae

To which of the following domains of life do humans belong?

Eukarya.

In the five-kingdom system, prokaryotes are placed in the kingdom _____.

Monera.

Identify a characteristic that is representative of some, but not all, life-forms.

Movement over great distances.

Roundworms are classified in the phylum _________.

Nematoda.

What is the smallest level of order at which evolution occurs?

Population.

What are the two main types of cells?

Prokaryotes and eukaryotes.

In the five-kingdom system, which kingdom consists primarily of unicellular eukaryotes?

Protista.

Which of the following things would be considered complex AND organized?

Red blood cell in the human body.

Why are annelids, arthropods, and mollusks placed in the same clade?

They are bilaterally symmetrical.

In the two-kingdom system, why were fungi classified in the kingdom Plantae?

They are sedentary.

The smallest unit of life that demonstrates all the properties of life is __________.

a cell.

Consider all of the organisms (human as well as nonhuman) that occupy your college campus. From a biological standpoint, this would be __________.

a community.

All of the following are features that collectively distinguish humans from other animals, EXCEPT __________.

ability to evolve as a species.

A group of tissues that carry out a specific function constitutes __________.

an organ.

According to this phylogenetic tree, annelids are most closely related to __________.

arthropods.

Echinoderms are __________.

deuterostomes.

According to this phylogenetic tree, chordates are most closely related to __________.

echinoderms.

The maintenance of a relatively stable internal environment is called __________.

homeostasis.

The process of homeostasis is:

how organisms maintain a constant internal environment.

The complexity of living systems:

is also highly organized.

All living organisms are part of the natural world because __________.

living organisms are made of matter and energy.

According to this phylogenetic tree, the clade that includes echinoderms and chordates is most closely related to the clade that includes _________.

molluscs.

There is _____ eukaryotic domain.

one

According to this phylogenetic tree, cnidarians are most closely related to __________.

platyhelminths.

All of the following apply to bipedalism in humans, EXCEPT __________.

presence of absence opposable thumbs.

Molluscs are __________.

protostomes.

Living systems need energy to:

replace worn-out parts and build new parts, grow larger, and help maintain a constant internal environment.

At the phylum level, you are most closely related to a(n) __________.

sea star.

DNA is a molecule that directly allows a living thing to:

store information.

An example of stimuli that a plant would respond to is:

sunlight.

Classification of organisms in domains and kingdoms depends on all of the following, EXCEPT __________.

the type of metabolism.

An organ, such as the liver, is composed of _____.

tissues.