The separation of the sister chromatids occurs in:

la - anaphase I

b - metaphase I

c - anaphase I and anaphase II

d - mitotic anaphase and anaphase II

(jusitfy your answer)

Why do you think it is important that cells have a "control system" to regulate the timing of cell division?

When compared to current average conditions, which term would best describe conditions in earth's lower atmosphere if greenhouse gases were absent?

DQ19: A pea plant must have exactly one of each of the following pairs of traits: Short (s) or tall (t); round (r) or wrinkled (w) seeds; yellow (y) or green (g) peas; and white (wh) or purple (p) flowers.

What human body system is the spinal cord in?

Which structures in the cell are proteins assembled in?

Which of the following do fish NOT use to breathe? A. air bladder B. pharyngeal slits C. pores on their back D. olfactory bulbs

Imagine a protein that has been engineered to contain a nuclear localization signal, a nuclear export signal, a C-terminal peroxisomal targeting sequence, and a canonical endoplasmic reticulum (ER) signal sequence.

Which organelle receives protein from endoplasmic reticulum and sorts and packages it for delivery outside cell?

Eukaryotic cells have many different specialized structures that are involved in making, organizing, and delivering a protein molecule. Describe the four organelles that are involved and the sequence of events of this process.

What do scientists call an orderly pattern of change over time? A. homeostasis B. ecological succession C. food web D. an ecosystem