All living cells use the molecule adenosine triphosphate (ATP)
A) to carry oxygen into cells
B) to catalyze biochemical reactions
C) as a building block for nucleic acids
D) to store and release energy for biochemical processes
Question 2
Isotopic evidence for the presence significant quantities of liquid water on Mars in the past comes from the observation of
A) an elevated ratio of deuterium to hydrogen
B) an elevated ratio of hydrogen to deuterium
C) a complete absence of hydrogen in the atmosphere
D) a complete absence of deuterium in the atmosphere
The direction of plant cell expansion is controlled by microfibrils and microtubules. Plant cells en
These older adults are participating in an exercise class at their assisted-living facility
Human embryonic stem cells stained with Tra-1-60 (green) - a stem cell marker and nestin (red), a ne
Crossing over during meiosis leads to allele combinations in sex cells that are not present in the p
Oxygen dissociation curve
White blood cells