Which structures in the plant connect the cytoplasm of adjacent plant cells?

a. Lignin
b. Extracellular matrix
c. Cell membrane
d. Cell wall
e. Plasmodesmata


e

Biology & Microbiology

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In an enzyme-catalyzed reaction, the reactant is called the  

A.  coenzyme B.  catalyst C.  substrate D.  product

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One group of fruit flies reproduces in August and one group reproduces in September. Which of the

following mechanisms is preventing them from cross breeding? a. hybrid sterility b. genetic isolation c. sexual isolation d. mechanical isolation e. temporal isolation

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Forests and other natural ecosystems, such as wetlands, exhibit the "sponge effect," meaning that they

A) soak up water from runoff and rainfall, and thus accumulate pollutants B) soak up pollutants from runoff and rainfall, releasing it quickly into streams and rivers and raising their levels C) soak up water from runoff and rainfall, saturating nearby ecosystems D) soak up water from runoff and rainfall, releasing it at a regular rate that moderates flooding of streams and rivers E) draw water away from rivers and streams, lowering their levels

Biology & Microbiology

Defensive proteins can assist the immune response by ________

A) helping viruses reproduce B) directly destroying pathogens C) reducing inflammation D) increasing lymph production

Biology & Microbiology