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Approximately what percentage of the average adult human body’s weight is made up of water?
AAbout 60 percent
BAbout 90 percent
CAbout 10 percent
DAbout 30 percent
What are the specialized proteins called that the immune system produces to specifically target and neutralize particular pathogens?
ANeurotransmitters
BEnzymes
CHormones
DAntibodies
What term describes the movement of water molecules across a semi-permeable membrane from an area of lower solute concentration to an area of higher solute concentration?
AFiltration
BDiffusion
COsmosis
DActive transport
What term describes the basic biological unit of heredity, made of DNA, that carries instructions for a specific inherited trait?
AEnzyme
BChromosome
CGene
DHormone
Which plant tissue is primarily responsible for transporting water and dissolved minerals upward from the roots to the rest of the plant?
AEpidermis
BXylem
CPhloem
DCambium
A prolonged deficiency of which vitamin can lead to a specific type of anemia called pernicious anemia?
AVitamin B12
BVitamin C
CVitamin A
DVitamin E
In humans, which combination of sex chromosomes typically results in a genetically male individual?
AYY
BXY
CXO
DXX
Which plant tissue is primarily responsible for transporting food, such as dissolved sugars produced during photosynthesis, throughout the plant?
AEpidermis
BPhloem
CXylem
DRoot hair cells
A deficiency of which mineral in the diet is the classic cause of goiter, an enlargement of the thyroid gland?
AZinc
BIron
CCalcium
DIodine
The ABO blood group classification system, still used today to determine blood type, was discovered by which scientist?
ALouis Pasteur
BKarl Landsteiner
CGregor Mendel
DAlexander Fleming