Many cell organelles, most notably the nucleus, are anchored by _______, which are assembled from a diverse class of proteins.
Fill in the blank(s) with the appropriate word(s).
Answer: intermediate filaments
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When the optic vesicle contacts overlying ectoderm, developmental events are induced, leading to ____ in the
developing lens.
a. crystallin and keratin synthesis b. crystallin synthesis c. keratin synthesis d. degradation of crystalline and keratin e. apoptosis
Eukaryotic cells are believed to have arisen
A) from a symbiotic relationship between primitive nucleated cells and bacterial cells. B) from the fusion of multiple archaeal cells into a larger, more complex cell. C) independently from prokaryotic cells. D) by mutations that lead to changes in plasma membranes, leading to internal membrane-bound organelles. E) independently from prokaryotic cells by mutations that lead to changes in plasma membranes, leading to internal membrane-bound organelles.
Which of the following statements about the epicotyl is true?
A. It is the portion of the stem axis that is directly below the cotyledons. B. It forms immediately above the secondary roots of a seedling. C. It takes up most of the volume within a monocot or dicot seed. D. It remains in the ground after a seed has germinated. E. The shoot apical meristem of a seedling is located just above it.
How does the urinary system promote homeostasis?
What will be an ideal response?