The organ system that maintains a constant internal environment through the excretion of nitrogenous wastes.
A) Muscular
G) Respiratory
B) Reproductive
H) Skeletal
C) Digestive
I) Nervous
D) Cardiovascular
J) Endocrine
E) Integumentary
K) Lymphatic
F) Urinary
F) Urinary
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The study of algae is called
A) algaeology. B) botany. C) mycology. D) phycology.
Deficiencies of which two minerals may result in muscular weakness?
a. iron and copper b. iron and manganese c. iodine and iron d. phosphorus and calcium e. phosphorus and potassium
The ABO blood type gene is an example of ___________, which means that heterozygotes display two phenotypes at the same time
a. advanced hybridism b. fading c. incomplete dominance d. codominance e. cross-fertilization
According to the pressure-flow model, ____
a. water moves from an area of positive water potential to an area of negative water potential b. the evaporative pull of transpiration produces tension at the top of the plant c. the flow of sugar is driven by a pressure gradient between the source and the sink d. pressure is created by the movement of water into the roots from the soil e. the production of sugar pushes it out of the chloroplast and into the xylem