A flower's _____ has one or more ovaries in which eggs develop, fertilization occurs, and seeds mature
a. pollen sac c. receptacle
b. carpel d. sepal
B
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The ________ microscope is capable of atomic resolution of specimens, even when they are immersed in water.
Fill in the blank(s) with the appropriate word(s).
Who demonstrated the possibility of producing organic compounds from gases and water if the mixture is exposed to sparks from an electrode?
a. Platt b. Thompsen c. Miller and Urey d. Pauling e. Starr
The plasma membrane is composed of ____
a. water and salts b. proteins c. nucleic acids d. primarily phospholipids e. proteins and carbohydrates
Enhanced immune responses to subsequent exposures to an antigen to which the body has already been exposed are known as ________ responses
A) third-degree immune B) allergic C) primary immune D) memory E) autoimmune