Life Science Review Qrt 1 and 2

Biology starts at the level of ___________ and moves through the study of biospheres.

• atoms

• cells

• organs

• organisms

The basic building blocks of matter

• atoms

• elements

• molecules

• organisms

A living thing

• element

• molecule

• isotope

• organism

The correct order for the organization of living things is

• cell -> tissue -> organ -> organ system -> organism

• cell -> atom -> organ system -> organism -> tissue

• cell -> atom -> molecule -> organism -> organ system

• tissue -> cell -> organism -> organ -> organ system

a major component of genes and proteins

• nitrogen

• sulfur

• iron

• oxygen

major part of photosynthesis and respiration

• carbon

• hydrogen

• sulfur

• calcium

makes up about 63% of the mass of animals and 75% of the mass of plants

• nitrogen

• carbon

• oxygen

• hydrogen

the main element in the hard part of bones

• nitrogen

• hydrogen

• oxygen

• calcium

is an important part of dna molecules

• phosphorus

• hydrogen

• sulfur

• iron

non found naturally in earth, must be combined with other elements like oxygen

• phosphorus

• sulfur

• calcium

• hydrogen