Which form of nucleic acid structure, A-form, B-form, or Z-form, is described by each of these statements?
This right-handed helix is found under normal, physiological conditions.
What will be an ideal response?
B-form
This form has a left-handed helix.
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How many checkpoints occur during interphase prior to a cell entering mitosis?
a. one b. two c. three d. four
Which evolutionary change was not one of the four primary milestones contributing to the evolution of the seed?
a. the proliferation of flagellated sperm b. the emergence of sexually different spores c. the protection of female spores and gametophytes within the body of the sporophyte d. the trend toward reduced gametophytes e. the evolution of the ovule
Turgor pressure is observed when a plant cells environment is ________.
A. hyperosmotic B. hypoosmotic C. isosmotic D. osmosis
In a cell that has a diploid number of 8 chromosomes, how many chromatids will be present at the beginning of mitosis?
A) 8 B) 16 C) 32 D) 4 E) 2