Biology Unit 1 Exam

Question 1

Definition of Biology?

Answer 1

Study of life

Bio = life
logy = study

Question 2

7 Properties of Life

Answer 2

1. Order - all living things have structure and organization
   ex: sunflower
2. Energy Processing (Metabolism) - all living things convert food to energy
   ex: butterfly eating nectar
3. Growth and Development - All living things mature
   ex: baby to adult
4. Response to Environment - All living things react to external stimuli
   ex: plant grabbing insect to eat it
5. Reproduction - All living things produce offspring
6. Regulation (Homeostasis) - All living things maintain stable internal conditions
   ex: body same temp
7. Evolutionary Adaptation - All living things change over time to better fit in their environment
   ex: seahorse camouflaging to environment

Question 3

All living things are made of and carry?

Answer 3

Cells and DNA

Question 4

Three Domains of Life

Answer 4

1. Bacteria
2. Archaea
3. Eukarya

Question 5

Four Kingdoms inside Domains?

Hint: A F P P

Answer 5

Animalia, Plantae, Fungi and Protista

Question 6

Unicellular

Answer 6

Single

Question 7

Eukaryotic

(we are eukaryotic)

Answer 7

• Nucleus
• Membrane-bound organelles
• Larger
• More organized and complex
• Unicellular and multicellular

Question 8

Multicellular

Answer 8

Many

Question 9

Prokaryotic

Answer 9

• No nucleus
• No organelles
• Smaller
• Less organized and less complex
• Unicellular

Question 10

Matter

Answer 10

Anything that takes up space and has mass

Question 11

Atom

Answer 11

Basic unit of matter

ex: car

Question 12

Element

Answer 12

Pure substance that can be broken down

ex: make or model of car

Question 13

Atomic #

Answer 13

Number of protons

Question 14

Mass #

Answer 14

Number of protons (+) + neutrons (0)

Question 15

How to tell number of neutrons?

Answer 15

atomic# - mass # = neutrons

Question 16

Polar

Non-polar

Answer 16

e- shared unequally // > or equal to 0.5

e- shared equally // < less than 0.5

Question 17

What are isotopes?

Answer 17

“variations” of atoms of same element with different number of neutrons

Question 18

Radioactive Isotope

Answer 18

Unstable isotope that releases energy over time (and particles)

Question 19

What is valence shell?

Answer 19

The outermost shell

Question 20

What does it mean if an electron is incomplete?

Answer 20

it has unpaired electrons

Question 21

All compounds are molecules, BUT not all molecules are compounds

Answer 21

True

Question 22

Which one is the strongest bond?

Answer 22

Covalent Bond

Question 23

Covalent Bond

Answer 23

Cov = 2
Valent = Valence

Chemical bond that involves sharing of electrons between atoms

Question 24

Nucleic Acids

Answer 24

stores genetic information

Question 25

Genes

Answer 25

sequences of DNA that encode info for protein

Question 26

Proteins

Answer 26

macromolecules that do various jobs

Question 27

Molecule

Ex: N=N

Answer 27

Grouping of two or more bonded atoms

Question 28

Compound

Hint: diversity!

Answer 28

Grouping of two or more bonded atoms of two difference elements

Question 29

Ionic bonds

Answer 29

Attraction between two oppositely charged ions

Anion & Cation
Metal & NonMetal on periodic table

Question 30

Hydrophilic

Answer 30

likes water usually polar molecules
interact = polar

Question 31

Hydrophobic

Answer 31

does not like water and does not interact = non polar

Question 32

Ice is less dense that H20 , why?

Answer 32

as water freezes, h2o molecules move further apart from one another to form more stable hydrogen bonds

Question 33

Water is ____ molecule

Charges for H-O-H

Answer 33

Polar

s+ - s- - s+

Question 34

Cohesion

Answer 34

water likes water and sticks to other water molecules

Question 35

Adhesion

Answer 35

water like non-water things
(polar)

Question 36

What is the tension of H2O?

Answer 36

Cohesion

Question 37

Molarity (m)

Answer 37

unit of measure for concentration

(how much solute dissolved)

Question 38

Lines for Covalent and Hydrogen

Answer 38

Covalent = straight bold
Hydrogen = lines parted

Question 39

What is a cell?

Answer 39

basic fundamental unit of life

Question 40

What is taxonomy?

Answer 40

classifying and organizing life

Question 41

What is an emergency property?

Answer 41

as smaller things combine to form larger, complex things that have new properties / characteristics

Question 42

What is an element

Answer 42

Pure substance

Question 43

What are four essential elements of life?

Hint: c, h, n , o

Answer 43

carbon
hydrogen
nitrogen
oxygen

Question 44

Chemical Bond

Answer 44

reactive bonds that come together to form a bond

(from incomplete to complete)

Question 45

Intramolecular

Answer 45

intra = within

chemical bonds between atoms of ONE molecule

• covalent + ionic

Question 46

Intermolecular

Answer 46

Inter = between

chemical bonds between DIFFERENT molecules

• hydrogen + van der Waals

Question 47

Bonds:
Single
Double
Triple

Answer 47

2 e-
4 e-
6 e-

Question 48

What is an ion?

Example of two types?

Answer 48

atom with positive or negative charge

Cation and Anion

Question 49

Why does water have the ability to absorb a lot of heat energy before it changes temperature or evaporates?

Answer 49

Water absorbs lots of heat because it takes a lot of energy to break hydrogen bonds between water molecules