Exocytosis is stimulated by regional increases in ________ concentration.
Fill in the blank(s) with the appropriate word(s).
calcium
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In Drosophila, a mutation in a gene for a bicoid transporter gene could result in which of the following?
A. offspring with no head B. offspring with no spiracles C. offspring with two heads and no spiracles D. offspring with the location of the head and spiracles reversed E. offspring with no head and two spiracles
Schwann cells produce a carbohydrate-like insulating material called myelin.
a. true b. false
The outermost region of the kidney is called the:a
adventitia. b. mucosa. c. pelvis. d. cortex. e. medulla.
Darwin observed that tortoises of the nearby islands, although slightly different, belonged to the same species. How might he have known they were the same species?
A) He probably compared DNA sequence data from the different tortoises. B) He probably compared the metabolism of the different tortoises and observed similar enzymes. C) He may have heard that tortoises of different islands could mate with each other. D) He may have moved one group of tortoises to a new island to observe accumulated changes.