The ____ have cerata on their surface for gas exchange
a. nudibranchs
b. limpets
c. scaphpods
d. chitons
e. cephalopods
A
You might also like to view...
How is pollentube elongation facilitated?
a. Pollen tube growth relies onchemical signals released by the pollen grain. b. Pollentube elongation will occur as long as the pistil provides moisture and energy. c. Chemical cues from female tissues help guide pollen tube growth, but the identity of these chemicals is not known. d. All the details of the chemical interactions between the pollen tube and pistil tissue have been elucidated and are well-described. e. Pollentube elongation occurs only in the absence of chemical cues from the female tissues.
What is the main function of RNA?
a. Copying DNA b. Protein synthesis c. Connecting nucleotides d. Storing genetic material
The association between actin filaments and the plasma membrane is mediated by all of the following except
a. catenin links to cadherins. b. direct interaction between actin and plasma membrane proteins. c. myosin I-calmodulin linkages. d. talin links to integrins.
The plasma membranes of some plant cells use transport proteins to move protons out of the cell against their concentration gradient (from areas of low proton concentration to areas of high proton concentration). This is an example of:
a) simple diffusion b) active transport. c) endocytosis. d) facilitated diffusion. e) passive transport