Of these options, which is the most specific category of biological classification?
A. genus
B. phylum
C. domain
D. species
Which of these is the best conductor of heat?
A. plastic
B. styrofoam
C. wood
D. metal
Which is considered the earliest stage of human development?
A. blastocyst
B. fetus
C. zygote
D. embryo
Which of the following cloud types occur at the lowest altitude?
A. Cirrus
B. Altocumulus
C. Cirrocumulus
D. Stratus
If two forces act on an object in opposite directions, the force that results is __________.
A. the difference between the two forces
B. the sum of the two forces
C. the product of the two forces
D. the ratio of the two forces
The category of weather system with the highest velocity winds is the __________.
A. thunderstorm
B. tornado
C. hurricane
D. sea breeze
The process by which energy is provided at the cellular level is called __________.
A. respiration
B. recreation
C. oxidation
D. metabolism
Blood leaving the lungs is __________.
A. hydrogenated
B. coagulated
C. watery
D. oxygenated
The first genetically engineered organism was __________.
A. sheep
B. tobacco
C. rats
D. wheat
Which of the following planets, known as gas giants have no rings?
A. Neptune
B. Jupiter
C. Uranus
D. they all have rings