Unit 1: What is Life Flashcards

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1
Q

What are the three domains of life?

A

Bacteria, archaea, eukarya

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2
Q

Prokaryotes

A

Organisms whose cells lack a nucleus

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3
Q

Eukarya (eukaryotes)

A

Organism with 1+ cells that contain a nucleus

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4
Q

Which of the 3 domains of life are prokaryotic?

A

Bacteria & archaea

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5
Q

Archaea are famous for inhabiting

A

Extreme environments

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6
Q

Eukarya includes what four organisms?

A

Animals, plants, fungi & protists

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7
Q

Protists

A

All eukaryotes that are not animals, plants or fungi

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8
Q

Atom

A

Fundamental unit of matter/elements

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9
Q

Molecule

A

2+ atoms held together by chemical bonds

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10
Q

Macromolecule

A

Large molecule composed of subunits

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11
Q

Organelle

A

Specialized subunit of cell

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12
Q

Cell

A

The basic unit of life

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13
Q

Tissue

A

Group of cells that carry out a similar function

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14
Q

Organ

A

Group of tissues uniting for a common function

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15
Q

Organ system

A

Group of organs working together

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16
Q

Organism

A

An individual living being

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17
Q

Population

A

Group of organisms living together of the same species

18
Q

Community

A

All populations in the same area

19
Q

Ecosystem

A

All living and non living things in an area

20
Q

Biosphere

A

All ecosystems on earth

21
Q

Four components that all cells share

A

Plasma membrane, cytoplasm, DNA, ribosomes

22
Q

What do ribosomes do?

A

Structures that synthesize protein

23
Q

Emergent property

A

New characteristics that arise at each level of complexity, that are not present in simpler levels

24
Q

Order of biological organization

A

Atom, molecule, macromolecule, organelle, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere

25
Q

The cell is the basic unit of life in terms of…

A

Structure and function

26
Q

ATP

A

Molecule used by cells to do “work”. The “energy currency” of the cell.

27
Q

What are the four major macromolecules?

A

Proteins, carbohydrates, nucleic acids, and lipids

28
Q

Evolution

A

Change in populations over time due to inherited (DNA) differences

29
Q

Functions of the cell membrane

A

Mediate communication
Separate cell from universe
Control enter/exit

30
Q

Are all organisms multicellular?

A

No they are unicellular and multicellular

31
Q

The plasma membrane is primarily made out of

A

Phospholipids

32
Q

In cells, the flow of information is from

A

DNA to RNA to protein

33
Q

Example of a macromolecule

A

DNA

34
Q

How old is the earth?

A

4.54 billion years old

35
Q

Membrane delimited

A

Selectively permeable barrier

36
Q

Homeostasis

A

Regulation of internal conditions

37
Q

Name some variables of homeostasis in the human body

A

Temperature, HR, BP, respiratory rate, fluid balance, blood sugar levels

38
Q

Classification of life

A

Taxonomy

39
Q

A bacterium is an example of a

A

cell and organism

40
Q

Virus cells lack

A

A cell membrane and ribosomes

41
Q

Major properties of cellular life include (4)

A

Membrane delimited, evolves, displays homeostasis, stores and uses energy

42
Q

Bacterium is an example of (3)

A

An organism and cell