What plant structures comprise a sorus?
a. rhizomes
b. fronds
c. strobili
d. sporangia
Ans: d. sporangia
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A(n) ________ is an instrument used to separate subcellular structures and macromolecules on the basis of size, shape, and density. ________ developed this instrument in Sweden during the period 1925—1930.
Fill in the blank(s) with the appropriate word(s).
The letter C indicates a ____
a. primary producer b. primary consumer c. second-level consumer d. third-level consumer e. fourth-level consumer
Considering the types of side chains on amino acids and their relationship to protein structure, where are the amino acids with hydrophobic side chains most likely to be located?
What will be an ideal response?
Which molecule is not formed by covalent bonding?
A) H2O B) CH4 C) O2 D) NaCl E) H2