General Biology Study Guide: LIFE

Question 1

SPECIES

Answer 1

A group of actually or potentially interpreting natural populations which are reproductively isolated from eachother such groups.

Question 2

ATOM

Answer 2

A basic unit of matter that can not be broken down by normal chemical reactions.

Question 3

MOLECULE

Answer 3

A chemical structure of at least 2 atoms held together by a chemical bond.

Question 4

BIOMOLECULE

Answer 4

Large molecules thar are typically formed by combining smaller units called monomers.

Question 5

ORGAN

Answer 5

Collections of tissues grouped together based on a common function.

Question 6

TISSUE

Answer 6

Groups of similar cells carrying out the same function.

Question 7

POPULATION

Answer 7

All the individuals of a species living within a specific area.

Question 8

ECOSYSTEM

Answer 8

Consists of all the living things in a particular area together with the abiotic, or non-living, parts of the environment such as nitrogen or water in soil.

Question 9

COMMUNITY

Answer 9

The set of populations inhabiting a particular area.

Question 10

BIOSPHERE

Answer 10

The collection of all ecosystems, and it represents the zones of life on earth.

Question 11

ORGAN SYSTEM

Answer 11

A higher level of organization that consists of functionality related organs.

Question 12

HOMEOSTASIS

Answer 12

Refers to the relatively stable internal environment required to maintain life.

Question 13

HOW DO WE CATEGORIZE LIFE?

Answer 13

☆ By looking at characteristics.
☆ Evolutionary relationships (how closely related organisms are).
To tell the difference between a virus and bacteria to diagnose a patient with a sore throat.

Question 14

WHY CATEGORIZE LIFE?

Answer 14

☆ To determine the difference between bacteria and viruses to diagnose a patient with a sore throat.
☆ Conservation and habitat presentation.

Question 15

WHAT ARE THE THREE DOMAINS OF LIFE?

Answer 15

☆ Bacteria
☆ Archaea
☆ Eukarya

Question 16

IN THE LEVELS OF TAXANOMIC HEIRARCHY, WHICH GROUPING OF ORGANISMS IS BROADER?

Answer 16

At the bottom of the levels it’s broader with less characteristics

Question 17

IN THE LEVELS OF TAXANOMIC HEIRARCHY which grouping of organisms is more specific?

Answer 17

At the top they have many more characteristics in common.

Question 18

HUMANS ARE IN WHICH DOMAIN?

Answer 18

Eukarya

Question 19

ON A PHYLOGENIC TREE, WHAT IS A NODE AND WHAT IS A BRANCH?

Answer 19

☆ A node is where 2 species seperate, and there is a common ancestor.
☆ A branch seperates the 3 domains of life

Question 20

WHAT IS LIFE? WHAT IS NOT LIFE?

Answer 20

Anything with a cell
Anything without a cell like a virus.

Question 21

DESCRIBE THE 9 CHARACTERISTICS THAT IDENTIFY LIVING SYSTEMS

Answer 21

☆ Order
☆ sensitivity or
response to
stimuli.
☆ Reproduction
☆ Evolutionary
adaptation
☆ Growth &
development
☆ Homeostasis
☆ Regulations
☆ Energy
processing
☆ Evolution by
natural selection

Question 22

WHY ARE VIRUSES NOT CONSIDERED LIFE?

Answer 22

They do not possess all the requirements to qualify as life. They cannot reproduce on their own so they need a host.
They are not cells and therefore do not get classified as alive.

Question 23

How do we categorize life?

Answer 23

By looking at characteristics
Evolutionary relationships, how closely related organsims are.

Question 24

WHY IS IT DIFFICULT TO DEFINE LIFE?

Answer 24

Because we have identified what the 9 properties of life are.

Question 25

DESCRIBE ALL THE LEVELS OF ORGANIZATION IN LIVING SYSTEMS. BE ABLE TO PUT THEM IN ORDER FROM SIMPLEST TO MOST COMPLEX

Answer 25

atom
molecule
macromolecule
cell
tissue organ
organ system
organism
population
community
biosphere

Question 26

WHY ARE VIRUSES NOT CONSIDERED LIFE?

Answer 26

THEY ARE NOT CELLS
THEY DO NOT POSESS ALL OF THE 9 PROPERTIES THAT IT TAKES TO BE CONSIDERED LIFE.