What are desirable characteristics for a gas exchange surface, such as the endothelial cells lining the inside of lung? Select all correct choices
A. a large surface area
B. a small surface area
C. a thickness of 100 micrometers
D. a thickness under 10 micrometers
A,D
Biology & Microbiology
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The excretory structures of annelids are referred to as
A. flame cells. B. kidneys. C. protonephridia. D. metanephridia. E. malpighian tubules.
Biology & Microbiology
Recessive traits are expressed only in the homozygous state. Indicate whether the statement is true or false
Biology & Microbiology
Natural areas that are protected from human development are called ________
Fill in the blank(s) with correct word
Biology & Microbiology
Hexokinase enzyme uses what metallic cofactor to transfer phosphate to glucose
a. iron b. nickle c. zinc d. magnesium d. manganese
Biology & Microbiology