Which algal group contains individuals that are typically unicellular and form siliceous shells?
a. diatoms
b. red algae
c. brown algae
d. green algae
e. dinoflagellates
a
You might also like to view...
The statement that, in garden peas, yellow seed is dominant to green seed means that:
A. when a true-breeding yellow seed parent is crossed with a true-breeding green seed parent, all offspring will have green seeds. B. when a true-breeding yellow seed parent is crossed with a true-breeding green seed parent, all offspring will have yellow seeds. C. when a true-breeding yellow seed parent is crossed with a true-breeding green seed parent, ½ of the offspring will have yellow seeds and ½ will have green seeds. D. when a true-breeding yellow seed parent is crossed with a true-breeding green seed parent, ¼ of the offspring will have yellow seeds and ¼ will have green seeds. E. we can't predict seed color in the offspring of a true-breeding yellow seed parent and a true-breeding green seed parent.
In determining the structure of ribozymes, why was it important that ribozyme sequences could be transcribed in vitro?
What will be an ideal response?
Which period was unusually dry, giving seed plants an evolutionary advantage over previously dominant seedless plants?
a. Pennsylvanian b. Mississippian c. Permian d. Devonian
If a chemical inhibitor of DNA ligase was added to bacterial cells after DNA replication initiation, the outcome would be
A) elongation of both strands would not occur without ligase to join new nucleotides together. B) elongation would occur, but Okazaki fragments would not be joined together. C) elongation of the lagging strand, but not the leading strand would occur. D) normal replication would proceed as DNA ligase is not required for this process. E) too many supercoils would build up in the DNA, resulting in a halting of elongation.