The three-dimensional shape of a protein is determined by the primary, secondary, tertiary, and in many cases, the quaternary structure of the protein. the following sentences are taken from a scientific article on protein structure. select the level of protein structure that applies in each case. "hydrogen bonds between peptide backbone components form a distinct helical structure."

Which statement is true about the cell theory? a) it is well-supported by evidence. b) it is unchangeable and permanent.

Indicate whether the following statements about the biases in the fossil record are true or false. a) inland species are more likely to be preserved than marine species b) organisms with hard body parts are more likely to be preserved than are those composed soft tissues. c) species that existed over a larger area are more likely to be preserved than species existing over a smaller area. d) organisms that lived very long ago are more likely to be found as fossils than organisms that lived relatively recently e) the fossils of larger organisms are more likely to be found than the fossils of smaller organisms

In some plants, pointed leaves (p) are dominant over rounded leaves (p). a plant with a genotype of pp