How do the amount and distribution of yolk in animal zygotes affect cleavage?
What will be an ideal response?
With little yolk, cleavage can be complete. With moderate amounts of yolk, the animal pole will divide before the vegetal. With large amounts of yolk, cleavage will be incomplete and will occur in the animal pole.
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Apoptosis is best described as
A. the process of an aging cell becoming cancerous. B. a process where cells destroy themselves. C. the process of immune cells recognizing an infected cell as "foreign." D. the destruction of a cell through mechanical damage.
Which excretory system disorder is treated by dialysis or a kidney transplant?
A. Renal failure B. Cystitis C. Kidney stones D. Glomerular nephritis
The cranial nerve that originates from both the medulla oblongata and the spinal cord is the ________ nerve
A) hypoglossal B) accessory C) vagus D) glossopharyngeal
Protein catabolism is an impractical source of quick energy because
A) the major byproduct is hydrogen, which cells cannot use for energy. B) proteins are unimportant to cellular homeostasis. C) the body cannot synthesize any of the amino acids, which it needs. D) proteins are catabolized much too easily, resulting in homeostatic imbalance. E) proteins are more difficult to catabolize than are complex carbohydrates or lipids.