Which group of organisms can trace their ancestry to the protists?
Select one:
a. All of the answer choices are correct.
b. None of the answer choices is correct.
c. fungi
d. plants
e. animals
a. All of the answer choices are correct.
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After ATP donates a phosphate group in a couple reaction, it becomes ADP. The ADP can be converted back to ATP in a(an) ____ reaction.
A. hydrolysis B. endergonic C. catabolic D. equilibrium E. exergonic
Which of the following is one of Chargaff’s
rules about DNA structure?
a. phosphate groups are connected to sugars by covalent bonds b. base pairs connect to each other by hydrogen bonds c. the amounts of adenine and thymine are the same as are the amounts of cytosine and guanine d. the DNA molecule forms into a double helix e. the strands in a DNA molecule run in opposite directions
With the exception of ______, all animals have some tissues organized into organs.
a) sponges and insects b) amphibians c) insects d) roundworms and flatworms e) sponges and some cnidarians
In the Hershey and Chase experiment, if the radioactive sulfur had been found inside the bacteria rather than the radioactive phosphorus, what conclusion would they have made?
a) Proteins are the molecules that encode heredity. b) DNA is the molecule that encodes heredity. c) RNA is the molecule that encodes heredity. d) Both RNA and DNA are molecules that could encode heredity e) This result does not show any evidence for what molecule encodes heredity.